Manchester United's Marcus Rashford celebrates scoring their first goal during the Premier League match between Manchester United and Chelsea at Old Trafford, Manchester, Britain, August 11, 2019. Rashford struck twice as Manchester United opened their Premier League account with a resounding 4-0 victory over Frank Lampard's Chelsea at Old Trafford on Sunday. Reuters/Jason Cairnduff

Manchester United are awarded a penalty after Marcus Rashford is fouled by Chelsea's Kurt Zouma during the Premier League match between Manchester United and Chelsea at Old Trafford, Manchester, Britain, August 11, 2019. Rashford struck twice as Manchester United opened their Premier League account with a resounding 4-0 victory over Frank Lampard's Chelsea at Old Trafford on Sunday. REUTERS/Phil Noble

Manchester United Marcus Rashford scores their first goal from the penalty spot during the Premier League match between Manchester United and Chelsea at Old Trafford, Manchester, Britain, August 11, 2019. Rashford struck twice as Manchester United opened their Premier League account with a resounding 4-0 victory over Frank Lampard's Chelsea at Old Trafford on Sunday. REUTERS/Phil Noble

Manchester United's Anthony Martial celebrates scoring their second goal with Marcus Rashford during the Premier League match between Manchester United and Chelsea at Old Trafford, Manchester, Britain, August 11, 2019. Rashford struck twice as Manchester United opened their Premier League account with a resounding 4-0 victory over Frank Lampard's Chelsea at Old Trafford on Sunday. REUTERS/Phil Noble

Manchester United's Marcus Rashford celebrates scoring their third goal as Chelsea's Cesar Azpilicueta and Kepa Arrizabalaga look dejected during the Premier League match between Manchester United and Chelsea at Old Trafford, Manchester, Britain, August 11, 2019. Rashford struck twice as Manchester United opened their Premier League account with a resounding 4-0 victory over Frank Lampard's Chelsea at Old Trafford on Sunday. Reuters/Jason Cairnduff

Manchester United's Daniel James celebrates scoring their fourth goal with Scott McTominay, Marcus Rashford and team mates during the Premier League match between Manchester United and Chelsea at Old Trafford, Manchester, Britain, August 11, 2019. Rashford struck twice as Manchester United opened their Premier League account with a resounding 4-0 victory over Frank Lampard's Chelsea at Old Trafford on Sunday. Reuters/Jason Cairnduff