Saliba joined Arsenal in 2019 for around £28million, but it was not until last Friday that he made his debut.
The 21-year-old impressed, earning the man of the match award and helping the Gunners kick off the campaign with a 2-0 win against Crystal Palace.
Gabriel, who was paired alongside Saliba in the heart of defence, has praised the Frenchman and believes he has settled well in London.
“For me, he’s the best! He’s very young, very promising and a very good player,” he told Standard Sport. “I am so happy to play with him, together. He has now started in the Premier League and he was so good.
“The team did very well. They showed intensity and everyone stayed together. It’s very difficult to play here, but our keeper was strong. I believe in this team and it was very good. We got a clean sheet and three very good points.”
Arsenal manager Mikel Arteta was impressed with Saliba too, who has carried on his fine form from pre-season.
“You don’t really see that,” said Arteta when assessing Saliba’s debut. “At 21 years old, debut in the Premier League, against this opponent, against physical players - and resolve that situation the way he has done it.
“With that composure, with that calmness and with that presence. So big credit to the boy. I wanted to let him be and let him play, that’s the way we have tried to develop that player.
“To sign him at 18 years old and bring him back two years later is something unusual and he has been so determined and willing to come here and now proved the point that he is ready.
William Saliba Arsenal career in pictures
“Now we are exposing the player in a really difficult environment where he can navigate and enjoy it and be comfortable.”
For the Love of Dogs viewers were left infuriated as they pointed out a 'bad habit' of presenter Alison Hammond's during the latest episode of the ITV show, which has seen ratings plummet.
Meghan Markle and Prince Harry made their first public appearance alongside Prince William and Kate Middleton in 2018, but a Royal author has claimed it was marred by an awkward moment
The moment was filmed by a Pollok resident who was left disgusted after spotting the vermin from her kitchen window in the Templeland Road area of Glasgow.
Callum Laing, 40, was diagnosed with a stage 4 Glioblastoma brain tumour, after he had been suffering from intense headaches - but surgeons in Edinburgh have made a surprising discovery.
The ITV The Martin Lewis Money Show star, who is a BBC Sounds podcast host too, spoke out on Twitter/X over how to get in touch with your bank urgently
Prince William made a surprise visit to a school in the West Midlands today, where he issued a 14-word update on his wife, Kate Middleton, amid her cancer treatment
Footage taken by a Brazilian tourist shows several pedestrians stepping to soothe the black horse which caused damage after running through the London streets on Wednesday.
Whatever the long-term electoral consequences of the ending of the SNP-Greens agreement, Humza Yousaf has at last seized one of the most important elements in politics: the initiative.
A horse trainer who was accused of the murder and rape of a showjumper he was in an “illicit relationship” with has been found dead before the second day of his trial was set to begin.
They contain a triple whammy of alpha linolenic acid, fibre and lignans which help protect against heart disease, high blood pressure and high cholesterol