When Bissouma first arrived at Brighton in 2018, he barely could construct a sentence in English and it was full-back Bong who took him under his wing and helped him out.
Malian midfielder Bissouma is the third signing for Spurs and arrives with a mixture of excitement and a hint of uncertainty.
According to Bong, the best way for supporters to get the most out of their new addition is to show him plenty of love from the stands.
The now-Nottingham Forest man told the Argus: “You could see after games how he enjoyed himself with the fans. They were singing his name and he loved that.
“He’s sensitive. The more love you give him, the more you get from him. In Brighton, he could find that. It was like a family.
“Last year he stayed because he loved the club but he had too much quality to not try something else.”
Check out the latest Premier League transfer speculation below...
1. Toffees lead Zinchenko chase
Everton are ahead of West Ham in the race to sign Manchester City star Oleksandr Zinchenko. (Goal)
2. Liverpool agree to Minamino sale
Liverpool have agreed to sell Japan international Takumi Minamino to Monaco for £15.5m. (Various)
3. Chelsea plot Clauss swoop
Chelsea are keeping tabs on France international Jonathan Clauss as they believe he could be a suitable replacement for Cesar Azpilicueta. The RC Lens player could be available for around £10m. (Goal)
4. Toon keen on Adarabioyo
Newcastle United are interested in Fulham defender Tosin Adarabioyo. (Mirror)