(Reuters) - Relegation-threatened Sunderland's manager Sam Allardyce has warned his players to learn from Tottenham Hotspur's mistakes and keep their heads when they host Chelsea in the Premier League on Saturday.
Chelsea came from behind to secure a 2-2 draw with Spurs at Stamford Bridge on Monday night, ending their rivals' hopes of winning the title in an ill-tempered London derby that saw a league-record nine Tottenham players booked.
