Alexis made his debut in United's FA Cup win at Huish Park, facing Zoko on the night.
Zoko told So Foot: "I found him very strong, but also very small! (Laughs)
"Whether in playing the game or trapping the ball, you see he's very good. But he happens to be in a team that is already very strong, very well organized for the loss of the ball and that does not leave you a second to organize himself.
"Manchester United do not play the best football in England, but structurally and tactically it's the best team. When you're not used to playing this rigor every weekend, you need time in the game to get level."