"The clean sheet record is still one of the targets we have, but the most important thing is victory," he said.
"We have two more games left to do it. Next week is important, but the FA Cup final will be one of the most important games I've ever played.
"It's normal my team mates and I are already thinking about the final, but there's still a game left which we must try to win.
"It's difficult to think about the Portsmouth game when you know even if you win it's going to be very difficult to finish second.
"We are close to United, but we have to be realistic. They will play at home and we know how strong they are at Old Trafford.
"We must still try to beat Portsmouth, and then from Sunday night we can concentrate only on the final.