Watford coach, Mazzari believes Isaac Success is more effective as a substitute than as a starter.
Success was impressive, drawing a string from Middlesbrough's Antonio Barragan in Watford’s Sunday, October 16 away win in the Premier League.
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Despite his performance, Mazzari believes the Nigerian forward was not as effective in his first start for Watford as he is when he comes off the bench.
“He [Success] played well, as did the whole team, but he did much better in the other games when he came on from the bench," Mazzari told Harrow Times.
"It’s not easy to start a game. It’s completely different, but if he gets his full condition then he also needs to learn some things and he will be a great player."
Watford travel to Swansea on Saturday, October 22 in their next Premier League game.