Arsene Wenger's side won 2-1 at West Ham on Sunday, confirming that their absence from Europe this season had given them a significant advantage.
The Gunners had a clear week to prepare for this game, while West Ham were in the midst of their first two-legged semifinal in 46 years, which manager David Moyes has admitted to prioritising.
Maybe they worked on set pieces all week. In the 38th minute, Rob Holding scored from a Bukayo Saka corner.
When West Ham failed to deal with Saka's delivery, Gabriel Martinelli returned the ball across goal for Gabriel to head past Lukasz Fabianski, Jarrod Bowen's deflected equaliser restoring parity on the stroke of half-time.
With Craig Dawson suspended and Thursday's Europa League semifinal second leg against Eintracht Frankfurt in his mind, Moyes felt he could only field one recognised centre-back at kick-off, and Arsenal scoring through both central defenders hammered home that point.
"We've got bigger fish to fry," one West Ham supporter said as he exited the London Stadium at full-time.
And West Ham have played 11 more games than Arsenal this season.
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