Roy Keane took aim at out-of-form forward Willian after Arsenal and Manchester United played out a goalless draw on Saturday evening.
Willian, 32, joined the Gunners on a free transfer from Chelsea last summer but has failed to live up to expectations since making the switch from west to north London.
The Brazilian is yet to open his account for Arsenal despite making 22 appearances in all competitions, and he endured another frustrating evening against United.
Four minutes after coming off the bench at half-time, Willian was presented with a golden chance to break the deadlock, but his lacklustre effort was blocked behind for a corner.
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