Bayern Munich seized on the uncertainty sweeping through Arsenal to claim a 3-1 victory in the first leg of their Champions League last-16 match on Tuesday, virtually booking the German side a place in the quarterfinals Goals by Toni Kroos and Thomas Mueller in the opening 21 minutes did the early damage for Bayern, a beaten finalist in two of the last three years, before Mario Mandzukic sealed victory with a bundled third in the 77th. Former Bayern forward Lukas Podolski had given Arsenal hope by making it 2-1 in the 55th but Bayern was well worth the win, and should have scored more in an embarrassingly one-sided first half where the visitors cut through their defensively inept opponents at will. The second leg is in Germany on March 13. (For more sports news and updates, follow Ahram Online Sports on Twitter at@AO Sportsand on Facebook atAhramOnlineSports)