Wigan Athletic boss Roberto Martinez feels they're capable of upsetting Manchester United tonight.

Martinez is encouraged by recent performances, particularly after winning at Liverpool last month and going down to a controversial last-gasp defeat at Chelsea on Saturday.

He said: "The performances we have had at Anfield and Stamford Bridge this season have got rid of that block.

"Against Manchester United you have to be perfect and we know now we can be perfect against these sides. Mentally we are ready for that.

"We are desperate to test ourselves against them and we are hoping for a bit of luck we have not had over the last few weeks or in the last few games against Manchester United."