MILAN, Italy -- Ludovic Giuly scored off a pass from Ronaldinho in the 57th minute Tuesday night, giving Barcelona a 1-0 win over AC Milan in the first leg of the European Champions League semifinals.
Ronaldinho, the reigning FIFA World Player of the Year, chipped a pass as Giuly beat an offside trap, and the French forward sent a left-footed shot past goalkeeper Dida.
Barcelona enters next week's return leg of the home-and-home, total-goals series with a nine-game unbeaten streak at Camp Nou in European play.
"I can't say if it was a deserved win, but it was the lead we hoped to achieve at Milan's home field," Barcelona forward Samuel Eto'o said. "Now it will be important to see what we will be able to do at home."
AC Milan's Alberto Gilardino hit a post in the 14th minute and, one minute later, Barcelona goalkeeper Victor Valdes blocked a header from Andriy Shevchenko.
"It was a very balanced match," AC Milan coach Carlo Ancelotti said. "Milan played well and produced some good scoring chances that unfortunately we did not turn into goals."
Ronaldinho hit a post in the 64th minute on a counterattack.
Arsenal hosts Spain's Villarreal on Wednesday night in the first leg of the other semifinal.