Alexa

Messi rescues Barca in Champions League

Barcelona draws 1-1 at Milan, Arsenal loses 2-1 to Dortmund in marquee Champions League games

Barcelona's Lionel Messi, right, celebrates with his teammate Alexis Sanchez after scoring during a Champions League, Group H, soccer match between AC...

Italy Soccer Champions League

Barcelona's Lionel Messi, right, celebrates with his teammate Alexis Sanchez after scoring during a Champions League, Group H, soccer match between AC...

Lionel Messi preserved Barcelona's unbeaten start to the Champions League by equalizing in a 1-1 draw at AC Milan but Arsenal's 100 percent record disappeared with a 2-1 loss at home to Borussia Dortmund in Tuesday's other marquee match.

Atletico Madrid made it three wins from three thanks to a double from in-form striker Diego Costa in a 3-0 victory at Austria Vienna, and Chelsea won by the same scoreline at Schalke.

Back from a thigh injury, Messi scored from close range to cancel out Robinho's opener for Milan and keep Barca in charge of Group H on seven points.

Robert Lewandowski grabbed an 82nd-minute winner for Dortmund at Arsenal in Group F. They are joined in a three-way tie on six points by Napoli, which beat Marseille 2-1.