QPR will take on Leeds at Loftus Road in London in the Championship on Saturday afternoon.
Smith has made only three starts and 13 substitute appearances in the Championship for Rangers so far this season, but the 28-year-old striker has still managed to score five goals and provide two assists.
The striker is a former Leeds player and was on the books of the West Yorkshire outfit during the 2013-14 season.
Fulham signed Smith from Leeds in the summer of 2014 for a transfer fee reported by BBC Sport to be worth £500,000.
QPR secured the services of the Englishman from Fulham in January 2017 for a transfer fee reported by The London Evening Standard to be worth £500,000.
Former Leeds and Scotland international winger Gray has jokingly suggested that he hopes that Smith does not start for QPR against Leeds.
Gray jokingly told LUTV about Smith: “He is a big fella, he is also a good header of the ball, so I would rather see him starting on the bench.”
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