Bayern Munich piled more misery on Arsenal by claiming a 3-1 win at the Emirates in Champions League play on Tuesday, putting the German side in pole position to advance to the quarterfinals.
Arsenal was looking to rebound from its loss in the FA Cup on Saturday, but goals from Toni Kroos, Thomas Muller and Mario Mandzukic all but sealed Bayern's place in the next round.
It took visiting Bayern less than seven minutes to open the scoring as Kroos got on the end of a pass to the top of the box and slammed a shot that made its way past a diving Wojciech Szczesny off the bounce.
Things got worse for Arsenal in the 21st minute when Daniel van Buyten headed a corner kick directly on goal. Szczesny was able to save, but in doing so pushed the ball directly into the path of Thomas Muller, who was arriving to scoop the rebound into the roof of the net from close range.
Arsenal regrouped at halftime and emerged reinvigorated for the second period. The Gunners pushed and eventually cut the deficit in half at the 55-minute mark when a corner kick pulled Bayern goalkeeper Manuel Neuer off his line, allowing Lukas Podolski to nod home for the home side.
The Gunners looked likely to grab another until Bayern made it three against the run of play. Second-half substitute Arjen Robben started a move in the 77th minute by freeing Philipp Lahm on the right side of the box. The Germany international made the most of his dangerous position by slotting a low cross to the back post where Mandzukic converted the chance with an awkward finish.
Arsenal must score at least three goals in the return leg at the Allianz Arena on March 13 to have any hope of overturning the two-goal aggregate deficit and qualifying for the next round.
FC Porto 1, Malaga 0
Porto, Portugal - Joao Moutinho grabbed the lone goal in FC Porto's 1-0 defeat of Malaga at the Estadio Dragao on Tuesday, handing the Spanish side its first-ever defeat in Champions League play.
The two sides remained scoreless until the 56th minute when Fernando delivered an inch-perfect cross from the left flank for Moutinho to redirect into the back of the net from inside the penalty area.
The Portuguese club held on to the lead and will take its one-goal advantage to La Rosaleda for the second leg, slated for March 13.