For two clubs with such rivalry over the past 20 years, Chelsea and Arsenal are familiar foes with many crossing the boarder of no mans land into enemy territory.
Chelsea have, more often than not, had the better of the deals. Whether it was signing Cesc Fabregas and winning two league titles with the Spaniard, having Ashley Cole in his primer years or watching Olivier Giroud win two European trophies in blue rather than red, Chelsea have had the better end of the stick.
Willian, David Luiz and Petr Cech all had better careers in west London before moving on as older players and ultimately failing to bring much to the Emirates Stadium. That doesn't count for much going into to the game on Sunday, but there is another way Chelsea can take advantage.
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Most of the narrative will, rightly, be headed Pierre-Emerick Aubameyang's way. It will be 11 months to the very day that he played his last match for the Gunners when he takes to the field against his former manager and club. Aubameyang's unceremonious departure was a catalyst for the steady improvement that has lifted Arteta to the top of the table.
Whilst Aubameyang dominates the pre-match talk though, slipping through the glamour will be 18-year-old Omari Hutchinson. The forward left Arsenal earlier this summer without playing a senior game for the club. He joined as a boy and it now looks likely he will be in the squad to face them.
Hutchinson's quick rise through the Chelsea academy teams has seen him excel for the Under-21s side in the Premier League. He has five goals and four assists in 11 games and earned a spot on the senior bench against Brighton, but was denied a first appearance in the calamitous 4-1 loss for Graham Potter.
Hutchinson will be lucky to get a first game on Sunday too, given the size of the game, but Potter has already proven with his line-up against Dinamo Zagreb that he isn't going to hand out squad spaces to anybody. Be that the right or wrong way to go about, Hutchinson has so far impressed enough to get consistent first team training time and could take advantage of the current squad issues to get a shot again his former club.
With no clear path at Arsenal, Gabriel Jesus' signing on top of Eddie Nketiah's role meaning that chances were likely to be small for a player that has already impressed Chelsea at an even younger stage, Hutchinson is maybe closer now than ever to getting a senior debut.
Although his time under Arteta was limited in a first-team capacity, he made the bench eight times in the league, and could prove to be a valuable secret weapon for Potter. His previous 'spy work' may well come in handy if he is given a run-out, and Potter isn't against these moves. He offered Carney Chukwuemeka serious game time in important situations against Brentford and Manchester United.
Hutchinson may well be the next cab off the rank, and with Jude Soonsup-Bell a target for Manchester City, his path to first team football could be opening up.
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