Arsenal have reached the quarter-finals of the FA Cup in five of the past seven seasons but for the first time since 2016-17, when they won the cup.
Gunners defeated Portsmouth by 2-0 goals, match played On Monday.
Portsmouth played well in the first half but Sokratis Papastathopoulos’ volley from Reiss Nelson’s cross just before the break made lead Arsenal 1-0.
Eddie Nketiah bundled home from close range from another Nelson cross to wrap up the victory six minutes after the second half start.
Arsenal limped out of the Europa League with a disappointing 2-1 home reverse to Olympiacos on Thursday and the FA Cup possibly represents their best route back into continental competition next term.