Chelsea coach Jose Mourinho claims that Diego Costa and Gary Cahill will both be fit to face Arsenal in the Community Shield at Wembley on Sunday. The pair was taken off duringTuesday’s friendly win against Barcelona, with Cahill suffering a suspected broken nose and Costa re-injuring his hamstring. Costa has suffered hamstring issues dating back to his time atAtletico Madrid, his problems restricting him to 23 Premier League starts last season. “We have three top strikers. If one is injured, we have two,” Mourinho said. “No concerns, noprotections. It’s a position where we’re very strong.”