Arsenal defender Per Mertesacker is adamant that new goalkeeper Petr Cech will help lead the club to success, despite making an indifferent start to life at the Emirates

Cech endured a nightmare Premier League debut for Arsenal as his two mistakes saw West Ham claim a shock 2-0 win in their first league outing, having helped Arsene Wenger's men defeat former club Chelsea in the Community Shield the week prior. Czech Republic international Cech looked more assured in Arsenal's 2-1 victory at Crystal Palace on Saturday and Mertesacker is in no doubt that