Chelsea suffered an FA Cup fourth-round scare on Saturday when they had to come from behind and needed extra time and a penalty save to beat League One Plymouth Argyle 2-1 with goals from Spaniards Cesar Azpilicueta and Marcos Alonso. Plymouth shocked the Premier League side when defender Macaulay Gillesphey nodded the ball home from a free kick by former Chelsea player Jordan Houghton in the eighth minute, sparking wild celebration and a shower of green balloons from the travelling fans. Chelsea coach Thomas Tuchel had tested positive for COVID-19 and missed the game. It was not clear whether he would be free to travel to Abu Dhabi next week for the Club World Cup.