Firas Zahabi, the head trainer for UFC welterweight champion Georges St-Pierre, does not believe his fighter can move up in weight to face Anderson Silva.

Instead, Zahabi wants to see Silva, the UFC middleweight champion, come down to 170 pounds for the one-off fight. Zahabi explained his reasoning during a recent appearance on The MMA Hour.

I wouldn’t want (GSP) to move up. I don’t know if Anderson can make 170 or something close to that. If Georges goes up, I know he won’t be able to come back down. He’s told me many times if he goes up he won’t go back down, and I believe him.

St-Pierre just recently unified the UFC welterweight title by defeating Carlos Condit. After looking at the division and not seeing many viable contenders, several have emerged, including Johny Hendricks.

The GSP-Silva talk is still in the infant stages, but UFC president Dana White has promised to make the match happen.