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Arsenal manager Mikel Arteta wasn't fully satisfied with his team despite them getting the better of Chelsea at the Emirates Stadium.
The Gunners needed just one goal to claim all three points on Sunday afternoon.
The Chelsea meeting was a game in hand, and one they needed to win - and they did just that - though they remain 12 points behind league leaders Liverpool with just nine games to go.
Despite taking an early lead, Arsenal weren't able to build on their early dominance against Chelsea - not that they needed to in the end.
"We play a top opponent and the team played with an unbelievable spirit and now we go to the international break.
Fellow injury victim Bukayo Saka is close to returning, though, and Arteta praised Merino while confirming Saka "has a good chance" of featuring in April when Arsenal return from the international break with a game against in-form Fulham.
"We have had top players out for many many months.
Chelsea are also hopeful of welcoming key players back after the international break.
"After the international break, we can have more players back like Nicolas Jackson and Noni Madueke for the final sprint.
"We competed well, The game was there.
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