We have seen a few upsets in the FA Cup this season, but whatever happens in the competition at the weekend, Millwall cannot afford to let their involvement in it distract them from the fact that they are in a serious relegation battle.

Millwall have a great chance to make it to the last four of the FA Cup for the second time in six years against Premier League Brighton on Sunday and there is no denying that this would have to be considered a brilliant achievement for the Championship side.

Neil Harris and his players will no doubt understand the importance of this game to their supporters and what it would mean to the club to have another semi-final appearance at Wembley.

The fans have got every right to be optimistic ahead of the game, but the players cannot let the experience of facing a Premier League side distract them from a number of key games over the next few weeks.

The Lions could find themselves back in the Championship bottom-three before a ball is kicked at The Den on Sunday, which shows just how tight it is down at the bottom.

Harris' side are currently 19th in the table, just one point above the drop zone with nine matches left to play, after a well-deserved and much-needed win over mid-table Birmingham City on Wednesday, which ended a run of four straight league defeats.

However, with Reading, Wigan Athletic and Rotherham United all just one point below them and all in action on Saturday, Millwall fans could see their side fall to as low as 22nd in the league table.

The good news for Millwall is that after what promises to be a competitive a game against Premier League opposition at the weekend, the players will have just under two weeks to prepare for their next league game, a crucial clash against high-flying Leeds United at Elland Road, due to the international break.

Whatever happens at the weekend the players must ensure they maintain their focus, ahead of what promises to be a crucial few weeks for the football club.