Arsenal's Reiss Nelson scores their first goal during the match FA Cup Third Round between Arsenal vs Leeds United at Emirates Stadium, London, January 6, 2020. Arsenal's Reiss Nelson scored early in the second half to secure a 1-0 win over battling Championship leaders Leeds United in the FA Cup third round at The Emirates. REUTERS/Eddie Keogh

Arsenal's Reiss Nelson celebrates scoring their first goal with Alexandre Lacazette during the match FA Cup Third Round between Arsenal vs Leeds United at Emirates Stadium, London, January 6, 2020. Action Images via Reuters/Matthew Childs

Leeds United's Patrick Bamford hits the crossbar with a shot at goal during the match FA Cup Third Round between Arsenal vs Leeds United at Emirates Stadium, London, January 6, 2020. REUTERS/Eddie Keogh

Arsenal's Emiliano Martinez in action with Leeds United's Mateusz Klich during the match FA Cup Third Round between Arsenal vs Leeds United at Emirates Stadium, London, January 6, 2020. REUTERS/Eddie Keogh

Leeds United's Ben White in action with Arsenal's Alexandre Lacazette during the match FA Cup Third Round between Arsenal vs Leeds United at Emirates Stadium, London, January 6, 2020. REUTERS/Eddie Keogh

Arsenal's Emiliano Martinez makes a save from a shot by Leeds United's Ezgjan Alioski during the match FA Cup Third Round between Arsenal vs Leeds United at Emirates Stadium, London, January 6, 2020. REUTERS/Eddie Keogh