Forshaw has generally had to play a back up role this term, with Adam Clayton and Grant Leadbitter both ahead of him in the selection order at the Riverside Stadium.
The 24-year-old has made only 10 Championship starts in just over a year for Boro, but his recent good form could be rewarded.
Forshaw has started in Middlesbrough’s last two matches, against Cardiff City and Fulham, and Karanka has suggested that he could now stay in the team.
“Adam’s a really good example for everybody because he has been waiting for his chance, he was really unlucky when he had two games to play (late last year) and he got injured and for that reason we had to bring in Bruno Zuculini and he lost his chance,” Karanka said.
“But when he was ready I told him he was the kind of player I could trust 100% but his problem was Clayton and Grant were playing really, really well.
“And now he has taken his chance.”
Clayton and Leadbitter are considered two of the Championship’s best midfielders, so to keep his place in the team Forshaw will know that his standards cannot afford to slip.
The central midfielder has certainly helped Middlesbrough regain form, after a sticky spell though.
Boro have won their last matches, having previously failed to win for five games.
Karanka’s side’s next match comes against Wolverhampton Wanderers on Friday evening, and if the Teessiders are able to win they could move to the top of the Championship table.