Emery has injected life into an Arsenal side that had stagnated in the final years of Arsene Wenger’s reign but losses to Manchester City and Chelsea and a draw with Liverpool had raised questions about Arsenal’s ability to compete with their biggest rivals.
Tottenham boss Mauricio Pochettino admitted his players suffered mentally and physically at the end of a draining week that included victories over Chelsea and Inter Milan.
In the first match of the day, a nervy Chelsea scored early through Pedro and late through Ruben Loftus-Cheek to see off London neighbours Fulham.
Sarri said he could see tension in his players at Stamford Bridge, even though last week’s defeat at Spurs was their first loss in the league this season.
On Saturday, Manchester United dropped points in a 2-2 draw against struggling Southampton and are now eight points off fourth place, still with a negative goal difference.
Jose Mourinho’s United host Arsenal on Wednesday knowing they cannot afford to lose as their chances of qualifying for next season’s Champions League look increasingly remote.
City beat Bournemouth 3-1 to move to record their 12th win in 14 matches, with 38 points in the bag already and a goal difference of +37.