Chelsea's Mason Mount celebrates scoring their first goal with Marcos Alonso during the match Premier League between Southampton vs Chelsea between St Mary's Stadium, Southampton, February 20, 2021. Chelsea were held to a 1-1 draw away to struggling Southampton in the Premier League. Pool via REUTERS/Michael Steele

Chelsea's Mason Mount scores their first goal from the penalty spot during the match Premier League between Southampton vs Chelsea between St Mary's Stadium, Southampton, February 20, 2021. Pool via REUTERS/Kirsty Wigglesworth

Chelsea's Cesar Azpilicueta in action with Southampton's Alex McCarthy during the match Premier League between Southampton vs Chelsea between St Mary's Stadium, Southampton, February 20, 2021. Pool via REUTERS/Michael Steele

Southampton's Takumi Minamino scores their first goal during the match Premier League between Southampton vs Chelsea between St Mary's Stadium, Southampton, February 20, 2021. Pool via REUTERS/Neil Hall

Southampton's Takumi Minamino celebrates scoring their first goal during the match Premier League between Southampton vs Chelsea between St Mary's Stadium, Southampton, February 20, 2021. Pool via REUTERS/Neil Hall

Chelsea's Reece James reacts during the match Premier League between Southampton vs Chelsea between St Mary's Stadium, Southampton, February 20, 2021. Pool via REUTERS/Neil Hall