Martinez and FA Cup final hero Ben Watson were the inspiration behind Wigan's quarter-final upset win over City, victorious manager Uwe Rosler said.
Ben Watson headed in the winner in the 90th minute at Wembley Stadium from Shaun Maloney's corner.
Watson suffered a broken leg in his side's 3-0 Premier League defeat at Liverpool on Saturday.
Watson scored his first EPL goal since December 2011 to give Wigan a 1-0 victory over Tottenham at White Hart Lane.
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