The two Spain-based players are widely regarded to be the two best footballers in world football at this present moment in time.
"I'd put him up their with Messi and Ronaldo — that's how highly I rate Gareth," Collison is quoted as saying by the London Evening Standard. "You know what you're up against with Gareth — pace, enthusiasm, energy.
"More recently for Spurs he's firing in the goals as well. He's going to be hard to stop, he always is, but we will have a game plan and we'll stick to that."
Bale has scored 17 goals in all competitions so far this season.