Petr Cech's Premier League debut with Arsenal couldn't have gone any worse. West Ham manager Slaven Bilic's debut couldn't have gone any better.
The star 'keeper and only major summer signing for the Gunners was poor on Sunday, to say the least, as his blunders played a part in both of West Ham's goals as Arsenal were shockingly upset to start the season, losing 2-0.
Cheikhou Kouyate's first-half header and a second-half Mauro Zarate strike were the difference for West Ham.
Despite outplaying West Ham in just about every statistical measure—Arsenal held 62 percent of possession and outshot West Ham, 21-8 (5-4 on goal)—the Gunners made the game's crucial errors and couldn't crack their opponent's resolute defense.