Arsenal boss Arsene Wenger believes that the Gunners missed Danny Welbeck's versatility in the earlier stages of the season.
The 25-year-old missed a major part of the campaign with a knee injury before making his first appearance in 2015/16 in February.
Welbeck scored the match-winning goal in the 2-1 win over Leicester City on his comeback, and he has since then scored three more goals for the Gunners, including the opener in the 2-0 triumph over Everton on Saturday.
"He can play on the flanks and through the middle, so I can play him with (Oliveir) Giroud or [instead of] Giroud - that gives so many options," Wenger said.
"You cannot say you don't miss a player of that stature for nine months.
"I believe [he can make a difference]. I had many hesitations to play him before the game because he is still not completely over his knee problem.
"We have to be cautious but I pushed it because I knew this was now or never [for the title bid]."