The Czech Republic international hit a thunderous half-volley in the second minute as the Gunners beat Tottenham at White Hart Lane on Sunday to keep their title hopes alive
The Czech Republic international settled Sunday's contest with Tottenham at White Hart Lane with a thunderous half-volley from the right-hand side of the penalty area that left Hugo Lloris helpless.
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Arsenal manager Wenger hailed the midfielder's contribution and in particular his match-winning strike.
"It will go in my collection of great goals," Wenger told reporters. "I told Tomas that, because first of all he is not a typical goalscorer and he surprised everybody.
"Before we realised what he was doing it was in the back of the net, it was an unbelievable goal."
The three points may prove crucial for Arsenal as they look to maintain pace in the Premier League title race.
Wenger's men sit third in the table, four points adrift of Chelsea with a game in hand.
The two rivals will meet at Stamford Bridge in a crunch clash next weekend, with the game marking Wenger's 1,000th match in charge of Arsenal.