William Saliba's Arsenal future is under threat from Real Madrid's interest, with the Gunners needing to win trophies to keep him.
The French defender has become a key player for Mikel Arteta's team, helping them challenge Manchester City for the Premier League title.
What's at stake for William Saliba?
Arsenal must fight hard to keep Saliba, who could be lured away by Real Madrid's success in La Liga and the Champions League.
Tony Cascarino, a former Premier League striker, believes Arsenal's success is crucial in convincing Saliba to stay.
Why is Real Madrid interested in William Saliba?
The Spanish giants are known for signing top talent, and Saliba's performances have made him a target, with Cascarino calling them the "biggest vulture" in football.
Saliba has shown his quality, contributing to Arsenal's best defensive record in the Premier League last season.
What does Arsenal need to do to keep William Saliba?
Cascarino said on talkSPORT that Arsenal must achieve success and win silverware to convince Saliba to stay, as the defender is already playing at a level worthy of Real Madrid.
The Gunners are close to winning the league title, but face competition from Pep Guardiola's Manchester City.
Arsenal's defensive partnership, including Saliba and Brazilian centre-back Gabriel, has been impressive, making them a formidable team.
The North London club must now prove their substance in the league and win trophies to keep their best players and attract world-class talent.
But with another Spanish giant, Barcelona, interested in Gunners midfielder Thomas Partey, Arsenal face a tough task in keeping their top players.
So, the pressure is on Arteta and the Gunners to deliver success and convince Saliba to stay at the club.
And with the French defender's head potentially turned by Real Madrid's interest, Arsenal must act fast to secure his future.
The Gunners' success in the league this season will be crucial in determining Saliba's future, with the Frenchman eager to play for a winning team.
As Cascarino said, "There are vultures in football hanging over football clubs all the time to try to snatch their best players.