Jamie Carragher labelled Moises Caicedo's Chelsea debut as a 'nightmare' after the midfielder struggled following his introduction against West Ham on Sunday.
10-men Hammers stunned Chelsea to score a third strike in stoppage time that Caicedo was at fault for after he hauled Emerson down to the ground in the penalty box.
Lucas Paqueta scored the resulting spot-kick to hand West Ham a deserved three points as Carragher blasted the Premier League's record-signing Caicedo for his showing.
It was a debut to forget for the Ecuadorian as he effectively handed the hosts three points by making the foul in a moment of rash decision-making.
Carragher said on Sky Sports: 'Caicedo has had a bit of a nightmare since he came on. It's a poor, lazy challenge.'