London:Alex scored both goals in PSV Eindhoven's 1-1 draw with Arsenal, first giving the English side hope and then giving his team a spot in the quarterfinals of the Champions League. The PSV defender tapped in an own-goal in the 58th minute on Wednesday to put the two teams even on aggregate in the second leg. But he then scored the deciding goal in the 83rd by heading in a free kick. "I feel that he won them the game tonight. He kept their defence very tight," Arsenal manager Arsene Wenger said. "He dominated our players in the air easily." Alex scored his team's goal off Edison Mendez's free kick. Earlier, Denilson sent in a corner and Emmanuel Adebayor jumped for the header, with PSV goalkeeper Gomes attempting to punch the ball away. But the ball sailed through untouched until Alex inadvertently tapped it into the empty net. "He's one of the best central defenders there is and it's incredible he plays for a team like PSV," PSV coach Ronald Koeman said of Alex, who is on loan from Chelsea. Koeman, who won the competition as a player with Barcelona in 1992, said Alex would be eligible to face Chelsea in the next round if the two team's are drawn together Friday. "He's a PSV player for one whole season and he can play," Koeman said. Missed chances Arsenal, which lost to FC Barcelona in last year's final and trailed 1-0 from the first leg, attacked from the start and missed a string chances. "It's a cruel night for us because we had the chances to score a second goal," Wenger said. "We lacked a bit of sharpness and of course we lacked a bit of quality in the final third." Kolo Toure, playing at right back due to injuries to Emmanuel Eboue and Justin Hoyte, outstripped Arouna Kone down the right and tore into the box but shot wide instead of playing it back for the onrushing Arsenal strikers. Ten minutes later, Adebayor missed when well placed in the box. But the Togo international was a constant threat to the PSV defense as he provided space for teammates, including Julio Baptista, who failed to convert two solid chances midway through the first half. PSV's first chance came in the 33rd when captain Phillip Cocu headed Mendez's cross from the right wide of Jens Lehmann's goal. PSV had seemed happy to only prevent Arsenal from scoring, but things changed after Alex tapped Denilson's corner into his own net. Arsenal attacked relentlessly after the goal and nearly scored another less than a minute later. Adebayor, played through by a long pass from Gael Clichy, forced Gomes to make a tough save before Cesc Fabregas shot wide. PSV then nearly scored when Mendez, who scored the lone goal in the first leg, shot wide. Arsenal continued to attack, however, and Wenger brought on Thierry Henry for Baptista in the 66th. But Gomes mad a nice save off a shot from William Gallas at near post, and then kept out a curling free kick from Henry with 10 minutes to go. Wenger later said Henry, who came on despite not being fully recovered from injury, will miss the next three weeks. The Frenchman has torn a stomach muscle and damaged a groin, Wenger said.