Bayern Munich defender David Alaba, 22, is confident that the Bundesliga champions will defeat Roma on Wednesday night in the Champions League.<br /><br />The 2013 champions will be assured top spot in Group E with two rounds to spare if they triumph over the Italian visitors.<br /><br /> &ldquo;We&rsquo;re still extremely hungry and ambitious. Roma remain a strong team, they&rsquo;re coming to us looking for points, and they have players capable of deciding a game on their own,&rdquo; David Alaba said at Monday&rsquo;s press conference.<br /><br />In the first leg fixture held at the Stadio Olimpico , Bayern Munich thrashed AS Roma 7 - 1, with Arjen Robben scoring a first half&nbsp; brace and creating an assist for Franck Ribery.<br /><br />David Alaba has played competitively for Bayern Munich 16 times this season, scoring two goals against Hamburg and Preu&szlig;en M&uuml;nster in the Cup.<br />