Former Manchester United custodian Ben Foster reckons he cannot understand why Arsenal sold attacker Leandro Trossard this summer. their first league title since their 'Invincibles' triumph under Arsene Wemger in 2004. "I think he’s such a big, influential player for them, and I can’t believe they’ve sold him. AdThe reigning Premier League champions pulled one back midway through the half, with Viktor Gyokeres scoring from the spot, but an equaliser wasn't to be. Four days later, they take on Manchester City in the FA Community Shield before they begin their Premier League title defence when they travel to Championship winners Coventry City on August 21.