London - West Ham United mounted a stirring comeback on Wednesday, roaring back from two goals down against Tottenham Hotspur to reach the League Cup quarter-finals while Chelsea saw off the challenge of Everton.
Slaven Bilic's side were trailing 2-0 at the break after an insipid first-half display but a brace from Andre Ayew and a third from Angelo Ogbonna shocked the Wembley crowd and completed an astonishing turnaround for the Premier League strugglers.
Spurs, who made multiple changes, were quickly in control through an early goal from Moussa Sissoko, who strolled through the middle of the defence and stroked the ball past Hammers goalkeeper Adrian after a pass from Son Heung-Min.
They doubled their lead with about eight minutes remaining in the first half when Dele Alli curled the ball into the net via a deflection off the head of the unfortunate Declan Rice, again following good work down the left from the impressive Son.
But the game came alive within 10 minutes of the re-start when Ayew pounced to poke home from close range after Spurs keeper Michel Vorm failed to hold a powerful Edimilson Fernandes shot from the edge of the area.
West Ham were level just five minutes later when Ayew applied the finishing touch to a cross by Manuel Lanzini and astonishingly took the lead when Ogbonna rose to head home Lanzini's corner with 20 minutes to go.
Spurs made seven changes to the side that thumped Liverpool 4-1 at the weekend, while Cheikhou Kouyate and Lanzini were the only survivors for West Ham from their weekend defeat to Brighton.
At Stamford Bridge, former Leicester City midfielder Danny Drinkwater impressed on his debut for Chelsea as the five-time League Cup winners also made nine changes against Everton, being overseen by David Unsworth, temporarily in charge after the sacking of Ronald Koeman.
German defender Antonio Rudiger gave Chelsea the lead midway through the first half with Willian later doubling their lead in added time. There was still time for an Everton consolation goal from Dominic Calvert-Lewin but it proved too little too late as Chelsea saw out the victory.
West Ham and Chelsea join Arsenal, Bournemouth, Bristol City, Leicester City, Manchester United and Manchester City in the draw for the quarter-finals on Thursday.