Desailly: Chelsea have psychological edge on Man Utd
"Even though [Cristiano] Ronaldo was not there, [Carlos] Tevez was not there and they had some injury at the start of the game to [Nemanja] Vidic, psychologically Manchester United will say, oh we have lost a game against them and we will have to be careful.
"When you are careful, you don't express yourself. You don't give 100 per cent, you may only give 90 per cent. Then, if Chelsea play well, we can win.
"But as a specialist of football I will tell you that it is going to be very hard,' he cautions, 'because the creativity of Manchester is higher than our own creativity, especially with the likes of Ronaldo.
"But it is football so we don't know really."