Younes Kaboul’s season could be over after the Watford centre-back suffered an injury in Saturday’s 1-0 win over Sunderland.

The 31-year-old pulled up with a hamstring complaint just before the half-time interval at Vicarage Road and looks set for a prolonged spell on the sidelines.

While further assessment of the injury is needed, Watford head coach Walter Mazarri says the early prognosis is not good for the Frenchman.

He said: “We need to assess Younes Kaboul and I have a feeling it is going to be a long time unfortunately.

“Tomorrow we will know what happened. With what happened on the pitch, we have a feeling it is going to be a long injury. Maybe out for the season, we do not know yet.”

Kaboul’s absence adds to an increasingly lengthy injury list for Mazzarri to contend with and he will be without a number of first team regulars for the visit of West Brom on Tuesday.

Ben Watson, Christian Kabasele and Valon Behrami are all set to miss the Baggies clash, while Mauro Zarate and Roberto Pereyra will not feature again this season.

The club will also monitor the fitness of Sebastian Prodl after the Austrian returned from international duty with a knock he has struggled to shake off.

Prodl did not play on Saturday, but Mazzarri is hopeful the influential defender will be fit to face Tony Pulis’ side.

He said: “I hope that he will be back. He trained today and was ok. We need to wait until tomorrow when we will have stronger training and see how he reacts.”

Watford’s current injury problems come at an inopportune time, with the club facing five Premier League games between now and May 1.

It is a turn of events which has left Mazzarri rueing bad luck after the club went through a March featuring just two games with comparatively few injuries.

“This year has been incredible. When we have many matches we have many injuries,” Mazzarri explained.

“When we only played two matches [in a month] we had very little injuries. Considering this the players are doing really well and if we can help them out of this we can do very well.”