Ki Sung-yueng was the hero as relegation-haunted Sunderland dumped Chelsea out of the Capital One Cup to book a place in the semi-finals.
The South Korea international struck in the final minute of extra time to complete a famous 2-1 win and end Jose Mourinho's hopes of winning the trophy which gave him his first honour during his previous spell at Stamford Bridge.
Lee Cattermole's own goal looked to have sent Chelsea through to the last four until substitute Fabio Borini struck with just two minutes of normal time remaining to send the tie into extra time.
Edin Dzeko pressed his case for a regular run in the Manchester City side with two goals in a comfortable 3-1 win at Leicester.
With top scorer Sergio Aguero facing at least a month out, Dzeko took his chance to shine at the King Power Stadium by netting twice after Aleksandar Kolarov opened the scoring with a free-kick.