The Irish star was there when it mattered again to tap home Simon Davies' deflected shot to secure a 2-1 win and three valuable points in the Barclays Premiership.
Incredibly, it was the fourth time Keano had come off the bench to score at the Lane after doing the same against Southampton, Fulham and Portsmouth.
Head Coach Martin revealed he had to play the waiting game. "I knew Robbie could do something but I had to wait," he reflected.
"We had a number of players with knocks and bruises from the other two games last Sunday and Wednesday.
"If you substitute too early you might get a problem later on, that's why I didn't bring him on earlier. I took a gamble and Robbie is one of those quality players who can always deliver.
"He's scored 15 goals and I think our strikeforce has scored 46 now. All I've said to them is when they come on, they have to make the difference and credit to them all, they have done that regularly."
Martin Jol had every confidence Robbie Keane would provide the magic to beat Manchester City on Saturday.