The two clubs are locked in negotiations, with the main sticking point what will happen at the end of the loan deal, with Arsenal keen for an option to buy.
Sahin is keen to join Arsenal and participate in the Champions League.
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The reputation of the Premier League means it is the most popular and one of the most watched leagues in the world.
Five English clubs will compete in the last sixteen of the Champions League for the first time ever as Liverpool, Manchester United, Manchester City, Chelsea and Tottenham face some difficult away matches.