Liverpool shows true grit as United unravels again

Liverpool's players overcame an unexpected test of their Premier League title credentials against last-place Sheffield United on Thursday. Manchester United, meanwhile, went into meltdown at Chelsea.

This was the latest reminder of the gulf that separates English soccer's fiercest rivals ahead of their clash at Old Trafford on Sunday.

Liverpool is back on top after a 3-1 win against Sheffield United, while Manchester United conceded two goals in stoppage time in a stunning 4-3 loss at Chelsea.