It was the 3-0 loss at the Emirates Stadium back in September which prompted Blues boss Antonio Conte to switch to what turned out to be a very successful 3-4-3 system.
Chelsea returned the favour with a 3-1 win at Stamford Bridge in February on route to regaining the Premier League title, but it was the Gunners who came out on top in the FA Cup final.
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The two sides’ latest clash came on Saturday in the Beijing National Stadium, also known as the Bird’s Nest, in China in front of a capacity crowd.
Chelsea went into the interval with a 2-0 lead, but there was one crazy moment midway through the first half which undoubtedly soured things for the English champions.
Strong Chelsea take control against Arsenal
The possession stats were fairly even but Chelsea created many more chances and that pressure paid off five minutes before half-time.
Willian produced a lovely, cultured finish to put Conte’s side 1-0 up in the 40th minute after good work from Michy Batshuayi, and it was the Belgian who doubled Chelsea’s lead two minutes later.
Ospina completely wipes out Pedro
However, before those goals, Spanish winger Pedro was left in a wretched state on the ground after being clattered into by Arsenal goalkeeper David Ospina in brutal fashion.
The Colombian had eyes for the ball as he punched it clear, but as you can see in the video below, he completely wiped out the Chelsea star in the process and nearly took his head off.
To the amazement of fans, the referee decided to give Arsenal a free-kick following the collision, and we’re struggling to see what Pedro did wrong.
The 29-year-old received treatment immediately but was unable to continue and was subsequently substituted off in the 29th minute and replaced by 20-year-old Jeremie Boga.
The former Barcelona forward recaptured his very best form last season, registering nine goals and nine assists from his 26 Premier League starts under Conte.
Details about how long he could be out for will only emerge after the match, but it’s safe to say that the Spaniard’s injury and the way he landed didn’t look too good.
What do YOU make of that collision between Pedro and Ospina? Be sure to leave YOUR opinion in the comments box below!