London: Premier League leaders Manchester United will face high-flyers Portsmouth at Old Trafford in the FA Cup after the draw for the fourth round was made on Monday.

In another top-six clash, Arsenal (fourth) are at home to fifth-placed bogey side Bolton Wanderers.

Chelsea, currently second in the Premier League, will also be at home where they will face League One Nottingham Forest, 2-0 conquerors of Premiership strugglers Charlton in the third round.

Arsenal have already overcome Premiership opposition in this season's FA Cup, knocking out holders Liverpool with a 3-1 win at Anfield last weekend.

But Bolton, in their last seven games against Arsenal, have won four, drawn two and lost just one.

Back in November, United beat Portsmouth, presently sixth in the table, 3-0 in a league match at Old Trafford.

Both sides were involved in all-Premiership clashes last weekend, with Portsmouth beating Wigan 2-1 at Fratton Park and United defeating Aston Villa 2-1 with an injury-time winner.

West Ham, last season's beaten finalists, are at home to fellow Premiership strugglers Watford.

League One promotion hopefuls Swansea, who beat top-flight Sheffield United 3-0 in the third round, now have a trip to either Ipswich or Chester - the lowest-placed club left in the draw at 15th in League Two, the fourth tier of the English professional game.

There is also the prospect of a fourth-round clash between Midlands arch-rivals West Bromwich Albion and Wolverhampton, who both play in the Championship.

West Brom, eyeing promotion to the Premier League, are already through to the last 32 after beating Leeds, but Wolves need to overcome League One Oldham in a third round replay if they are to set up a 'Black Country' derby.