Andre Carrillo’s fitness will be assessed ahead of Arsenal’s trip to Vicarage Road before Marco Silva decides whether to include the Peruvian tomorrow.

The 26-year-old returned from a gruelling international break, which saw Peru draw with Argentina and Colombia to set up a play-off with New Zealand next month, on Thursday.

Silva confirmed he will talk to Carrillo, who was set to join the Watford squad in training this morning, ahead of deciding whether he would play a part tomorrow.

“He will do this first session and we will need to see his condition and I need to talk to him a little bit,” Silva said.

“After that I will make my decision. It is not the first time [Carrillo has returned form representing his country]. I remember against Southampton we had the same and I decided to start him.”

Silva is certain to be without Younes Kaboul, while Sebastian Prodl is still doubtful despite making progress in his recovery.

The Watford boss also shed light on the severity of the injury suffered by Isaac Success, who posted a picture from a hospital bed on Instagram earlier this week.

Silva confirmed the attacker will be out for some time.

“The timescale is not easy to say for this type of injury, but we expect between six and eight weeks,” he said.

“It is a problem with the knee and an injury he picked up in a session here.

“It was a normal situation [to get injured] and the problem is bigger than we thought, so we will have to wait and see.”