Boris Becker and Lilian de Carvalho Monteiro enjoy beach day with his son amid Lilly backlash

Boris Becker and his girlfriend Lilian de Carvalho Monteiro enjoyed another beach day with his son Amadeus in Ibiza on Saturday.

The former world No. 1 professional tennis player, 52, tapped into full relaxation mode as he sat on a lounger alongside his bikini-clad partner and his 10-year-old. 

Their sun-soaked outing came just hours after his estranged wife Lilly, 44, urged Lilian to ‘step away from my child’ in a now-deleted Instagram post.

Family outing: Boris Becker and his girlfriend Lilian de Carvalho Monteiro enjoyed another beach day with his son Amadeus in Ibiza on Saturday

Turning heads, Lilian showcased her incredibly toned figure in an orange two-piece, complete with a triangle bikini top and matching briefs.

The brunette maintained her chic display in the accessory department with square-framed shades, a cream trilby and a gold necklace.

With her tresses drenched in water, she went make-up free to highlight her naturally radiant features.

Turning heads: The brunette showcased her incredibly toned figure in an orange two-piece, complete with a triangle bikini top and matching briefs

Turning heads: The brunette showcased her incredibly toned figure in an orange two-piece, complete with a triangle bikini top and matching briefs

'I beg you step away from my son!' Their sun-soaked outing came just hours after his estranged wife Lilly, 44, hit out at Lilian in a now-deleted Instagram post(pictured in 2019)

‘I beg you step away from my son!’ Their sun-soaked outing came just hours after his estranged wife Lilly, 44, hit out at Lilian in a now-deleted Instagram post(pictured in 2019) 

Lilian later threw on an oversized linen shirt and shorts as she helped Amadeus put on a top, despite Lily’s wishes.

Sportsman Boris, meanwhile, opted for comfort in a grey T-shirt and navy shorts while going barefoot.

Earlier in the day, Lilly hit out at Lilian after she was seen with her son Amadeus in Ibiza on Monday. 

Sensational appearance: The bikini babe maintained her chic display in the accessory department with square-framed shades and a cream trilby

All in the details: She rounded things off with a gold necklace

Sensational appearance: The bikini babe maintained her chic display in the accessory department with square-framed shades and a cream trilby

Chilling out: The former world No. 1 professional tennis player, 52, tapped into full relaxation mode as he sat on a lounger alongside his bikini-clad partner and his 10-year-old

Chilling out: The former world No. 1 professional tennis player, 52, tapped into full relaxation mode as he sat on a lounger alongside his bikini-clad partner and his 10-year-old

Wow: Lilian caught the eye of onlookers as she paraded her enviable figure in the barely-there ensemble

Wow: Lilian caught the eye of onlookers as she paraded her enviable figure in the barely-there ensemble

Going strong: The couple were first spotted together in June, just months after he was linked to model Yoana Montero

Keeping updated: At one point, she looked at her mobile phone

Going strong: The couple were first spotted together in June, just months after he was linked to model Yoana Montero

Romance is alive: The couple held onto their devices as they enjoyed their first getaway together

Romance is alive: The couple held onto their devices as they enjoyed their first getaway together 

Dressed down: Sportsman Boris, meanwhile, opted for comfort in a grey T-shirt and navy shorts while going barefoot

Dressed down: Sportsman Boris, meanwhile, opted for comfort in a grey T-shirt and navy shorts while going barefoot

In the post, the model implored to Lilian: ‘Let me put it his way so you understand: during the period of #corona! You’re the 2nd girl within 7months to make breakfast – pizza- pancakes for my son! (sic) 

‘No girl – as a mother please respect my son and go take pics with @borisbeckerofficial in your cute bikini and your fabulous body but I beg you step away from my son! (sic)’

Lilly then requested that Lilian ‘take Boris hand’ during the trip rather than try and get close with her son.

Referring to her estranged husband, Lilly went on: ‘B won’t tell you! But I will otherwise you won’t get the message! Have a fab holiday – without touching my kid! He’s off limits! Period!!’ (sic) 

Sweet display: Amadeus played with a dog as he frolicked on the sandy shores of the island

Sweet display: Amadeus played with a dog as he frolicked on the sandy shores of the island

Watch her glow: She went make-up free to highlight her naturally radiant features

Effortlessly stunning: Her tresses were drenched in water, which formed a wavy texture

Watch her glow: With her tresses drenched in water, she went make-up free to highlight her naturally radiant features

Legs for days: Lilian later threw on an oversized linen shirt and shorts

Legs for days: Lilian later threw on an oversized linen shirt and shorts

Style savvy: Boris' latest arm candy held onto her favourite straw holiday bag

Duties: She was seen unravelling Amadeus' striped top

Style savvy: Boris’ latest arm candy held onto her favourite straw holiday bag

Family fun: The youngest of the Becker clan held onto his pet pooch

Family fun: The youngest of the Becker clan held onto his pet pooch 

MailOnline contacted Boris and Lilly’s representatives for comment. 

As well as Amadeus, Boris and Lilian were also joined by his son Elias, who turns 21 in September. 

He shares the model and eldest child Noah, 26, with ex Barbara, and only daughter Anna Ermakova, 20, with Angela Ermakova. 

Prior to dating Lilian, Boris was dating model Yoana Montero, and was also thought to be involved with model Layla Powell, 32, when he liked a series of her Instagram snaps in 2019. 

Uh oh: Despite Lily's wishes, Lilian still engaged in conversation with the Rotterdam beauty's son

Uh oh: Despite Lily’s wishes, Lilian still engaged in conversation with the Rotterdam beauty’s son

Doting step-parent: The TV star helped Amadeus put on a top as they headed off

Doting step-parent: The TV star helped Amadeus put on a top as they headed off

Blossoming: The duo proved to be getting on like a house on fire

Blossoming: The duo proved to be getting on like a house on fire 

Restrictions: The family face 14 days of quarantine when they return to the UK after the government pulled its air bridge with Spain following a spike in COVID-19 cases

He's got it! As Lilian let go of the garment, Amadeus was more than capable of wearing his clothes

Restrictions: The family face 14 days of quarantine when they return to the UK after the government pulled its air bridge with Spain following a spike in COVID-19 cases 

Looking into the distance: The retired athlete stroked his hair with his fingers as he carried beach bags

Looking into the distance: The retired athlete stroked his hair with his fingers as he carried beach bags

The former Wimbledon champion split from Lilly in 2018 after a 13-year relationship and nine years of marriage, and it is understood that they are in the ‘final stages’ of divorcing. 

In May 2019, the pair reached an agreement after becoming embroiled in a family court dispute over their son Amadeus.

Lilly reflected on 2018 after parting ways from her husband of nine years during an interview with Günther Jauch on Germany’s RTL.

'He's off limits! Model Lilly uploaded an image of Lilian playing with her son and urged her to 'step away from my son'

‘He’s off limits! Model Lilly uploaded an image of Lilian playing with her son and urged her to ‘step away from my son’

She admitted the couple will never rekindle their relationship, insisting: ‘It’s really over between us. 2018 was the worst time of my 42 years. He so grossly disappointed me.’

Speaking on the negative effects of being in the limelight, she went on: ‘What makes it so bad is that everything is happening in public now. But I married a public man, maybe it’s part of it.’

‘Unfortunately, [a reunion wouldn’t] not work anymore. Too much has happened. I do not want to, he does not, and that’s fine. It’s really over between us.’

Parting ways: Boris split from her in 2018 after a 13-year relationship and nine years of marriage, and it is understood that they are in the 'final stages' of divorcing (pictured in 2016)

Parting ways: Boris split from her in 2018 after a 13-year relationship and nine years of marriage, and it is understood that they are in the ‘final stages’ of divorcing (pictured in 2016)