The Ox struck twice in victory over Crystal Palace on Sunday.
"It's fantastic to see him back after a long-term injury," said Poland international Szczesny.
"He scored two very important goals and he's always moaning about his goalscoring record.
"Alex has played mostly out wide for us. But we've seen him play in the middle a few times and he plays there in training so we know his qualities.
"He can go past players, he can score - which he has shown - and we hope he can keep it going, because if he keeps producing performances like that he will be a very important player for us."
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