Former Arsenal defender Kolo Toure says they must do all they can to tie down Bukayo Saka.
The attacker has been locked in talks over a new contract for almost 18 months.
"I just have to say one thing. My advice to Arsenal is to sign a long contract with Bukayo. Sign a 10-year contract with him," said Tour to Sky Sports.
"One mistake that Arsenal have made over the years is that they let go of key players. That must not be the case now."
This season, the 21-year-old has 12 goals and 10 assists in the Premier League.
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