Lukas Podolski struck twice as Arsenal eased into the fifth round of English football's FA Cup with a comfortable 4-0 home victory over League One side Coventry.
Replacement Olivier Giroud scored Arsenal's third goal before fellow substitute Santi Cazorla completed the rout in the 89th minute.
Nottingham Forest was held to a 0-0 draw at home against Preston, forcing a rematch to be scheduled.
