Harrison has been somewhat indifferent for Leeds this season.
Tony Pulis has been quoted by Gazette Live as heaping huge praise on Leeds United winger Jack Harrison, after working with the Manchester City loanee at Boro last season.
Harrison, 22, has made 24 appearances in all competitions for the Whites this season and is expected to start against Middlesbrough on Saturday afternoon, which sees him return to the Riverside.
The England Under-21 international joined Boro on loan for the second half of the 2017-18 campaign under Pulis, but managed only four appearances for the Teesside club.
Pulis heaped praise on the former New York City winger, stating his parents could be proud of his progress with second-placed Leeds and is wary of Harrison coming back to haunt Boro.
“It will be nice to see Jack Harrison too. He was a wonderful lad and he left a good impression here. He parents can be very proud,” Pulis said. “You always take an interest in how former players get on in their careers.
“There is a thing in football about old players coming back to haunt you and they want to make a mark so we will have to be wary of that.”
Harrison has been very much in and out of the Leeds side this season, scoring only two goals and creating two assists. The rise of Jack Clarke has limited his game time at Elland Road.
Leeds will be desperate to end a bad run of results that has seen them lose four of their last six, slipping to second in the Championship table. Middlesbrough, meanwhile, can go within just a point of Sheffield United in third.
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