Arsenal manager Arsene Wenger hailed match-winner Alex Song after the dramatic 1-0 win over West Ham.
The Gunners left it till the 88th minute against their London opponents at the Emirates Stadium, after Avram Grant's men had battled valiantly in defence.
Song latched on to a Gael Clichy cross to nod past the excellent Rob Green and make it two goals in two league games.
Wenger told Sky Sports: "He is amazing because he came as a centre-back, becomes a defensive midfielder and now he plays like a striker.
"He has added something to his game. He has good timing to get into the box because in the first half he had two good chances, one on his right foot and one header as well.
"When you get two or three chances in the game as a defensive midfielder that means you have good timing.
"(It was a) fantastic piece of play and Clichy has improved a lot going forward. He is calmer and has a good right foot now as well."
West Ham remain bottom of the Premier League after the defeat but Wenger admits his side were in a real battle.
"It was a battle. It was a battle where on our side we needed to be patient, intelligent and sometimes a bit lucky," he added.
"West Ham defended well. Their keeper as always has a great game against us and at the end of the day our keep-going spirit got us through.
"We didn't make mistakes at the back, we kept a clean sheet and in this kind of game this is the most important."
On the Hammers' plight, he remarked: "You would never guess (they were bottom of the league) if you saw them play today.
"If they keep that spirit and keep going like they did today they will never remain there, they will push up very quickly."
The Gunners now travel to Ukraine to face Shakhtar Donetsk in the UEFA Champions League on Wednesday and Wenger hopes the team can earn qualification to the next stage of the competition.
"We will see a different Shakhtar Donetsk to what we have seen because they will have felt humiliated here and will want to put much more dynamic into their game," he said.
"But there is a good opportunity to qualify and guarantee top of the group. It's a great opportunity for us and we go there trying to win the game."