Wenger is taking back Thierry Henry today on-loan from New York Red Bulls.
He said: "Sol was fantastic when he came back. Sol is like Thierry. Once they are committed, you know you can rely on them.
"I remember when we went to Tottenham, Sol was absolutely amazing for a guy who, three weeks before, you wondered if this guy can still play in the Premier League.
"He had such a capacity to fight and it's important to bring that out. They have that pride. When players play they will want to be good."