MIAMI GARDENS, Fla. It's only a preseason tournament, and the trophy isn't exactly steeped in soccer history. None of that mattered to Nike Mercurial 7 Rooney andManchesterUnited. Louis van Gaal (AP Photos) MORE: Huge summer crowds should convince MLS to chaussures de foot homme more for players Rooney and Juan Mata scored two minutes apart in a second-half flurry, Jesse Lingard added an insurance goal in the final minutes andManchesterUnitedrallied to beat longtime rival Liverpool 3-1 in the title match of the International Champions Cup on Monday night."It's obviously great to win the game and win tournament," Rooney said in an on-field interview after the match. "We worked hard in preseason and to go unbeaten gives us confidence."Steven Gerrard scored on a penalty kick in the 14th minute for Liverpool, which toppedUnitedtwice last season in Premier League play.Last season was wildly disappointing byUnitedstandards, but it is now unbeaten in five matches under new manager Louis van Gaal. And while his players were clearly thrilled, van Gaal offered a one-word assessment of what winning a preseason tournament means."Nothing," van Gaal said.MORE: Soccer wives and girlfriends Clearly, no disrespect was meant. But clubs likeUnitedare looking for th  @uc@a0yu4ue2zg@uc@