Manchester United central defender Nemanja Vidic has pointed to his club's most obvious weakness ahead of Wednesday's clash with Arsenal in the Champions League semifinal.

"In the first half [against Tottenham] we didn't defend very well," Vidic said. "In the second half we came back much stronger, and that is how we need to play against Arsenal and any team we play against. It just happens - sometimes things go wrong. We will try to fix the problems we have had in the last games, but we need to remember as well that we have changed many players. We have not played with a consistent team at the back, even in the middle or up front. We have so many games that sometimes you have to change the team and sometimes you need time to adapt."

Manchester United's defense has been rocky of late. Before the Tottenham game, the back four had three shutouts, but conceded 12 goals in the previous five game. Read the original story...