Watmore has been out with injury since March, with the Sunderland striker really struggling to make it off the treatment table.
Over the last two years Watmore has barely been able to feature for the Black Cats.
However, Ross has been impressed by the 25-year-old’s displays in Sunderland training in the build-up to the second-leg of their play off semi-final against Portsmouth.
And the Sunderland boss has hinted the the rapid attacker could actually be part of the Black Cats’ squad which travels to Fratton Park now.
"He's ahead of schedule and looks positive and bright in training, so we are hopeful," he said.
“He's forced his way into the reckoning more than we expected, so it gives us something to ponder ahead of Thursday night.
"The way the tie is poised is the reason he has come much more into my thoughts.
"He has looked really good in training and he has come back fit and healthy from his ankle injury.”
Sunderland go into the second-leg of their tie against Pompey protecting a one-goal lead.
Watmore could provide Sunderland with pace on the break, with Portsmouth forced to attack them now.
The winners of Sunderland and Portsmouth’s clash will go on to face either Charlton Athletic or Doncaster Rovers at Wembley in the final.
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