At the 2011 FINA World Championships in Shanghai, China, Mate competed again in two breaststroke events, but achieved a poor performance. He finished thirty-ninth in the 100 m breaststroke, and thirty-second in the 200 m breaststroke, posting his slowest possible time of 1:01.88, and 2:15.45, respectively. He bettered his mark in the preliminary rounds, at the 2012 European Championships in Debrecen, with a time of 2:14.79, but finished in nineteenth place.