Walter Mazzarri hopes Watford's dilemma up front proves a Success against Boro
Walter Mazzarri is yet to decide whether Watford's club-record signing Isaac Success will start his first Premier League game at Middlesbrough on Sunday.
The 20-year-old Nigerian, a £12.5million signing from Granada, scored his first goal for the Hornets in the 2-2 draw with Bournemouth prior to the international break.
Success withdrew from Nigeria duty after sustaining a knock when he had been in line to make his debut. He could now earn his first Watford start.
"Isaac Success recovered very well. He looks okay," Mazzarri said.
"The only thing I need to check now is if he's got 90 minutes in him and if he has recovered completely from injury in the last game."
Mazzarri insisted there was no falling out with Nigeria over Success' absence.
"Immediately after the (Bournemouth) game we sent an email to the Nigerian federation and spoke to them on the phone, confirming that Success had an injury," the Italian added.
"They replied by email confirming Success was excused by their technical director. We don't have any problem with the Nigeria national team."
Mazzarri has a decision to make over who partners Troy Deeney, who has scored in three of his last four games to move to 99 goals for the club.
Odion Ighalo has scored twice in eight appearances this season and started against the Cherries, while Stefano Okaka has made just one appearance since his summer switch from Anderlecht.
Mazzarri added: "I have four forwards, many different possibilities, different options. I will make my decision the day before the game.
"Mainly what I ask from my forwards is that they don't need to score but to play very well."
Swiss midfielder Valon Behrami is a minor doubt for the Middlesbrough clash with an undisclosed problem, but defender Miguel Britos is expected to return following a groin injury.
Northern Ireland defender Craig Cathcart is likely to be absent once again.