Mackay-Steven, 26, was a major signing for Celtic in January 2015, as they first agreed a pre-contract deal with the former Liverpool youngster, before convincing Dundee United to sell up whilst they still could.
John Souttar (R) in action with Celtic's Gary Mackay-Steven
The Scottish winger hit four goals in his first 15 games for Celtic, and chipped in with six goals in 37 games last season having been something of a regular under former Bhoys manager Ronny Deila.
However, Mackay-Steven has found first-team football a little harder to come by this season, as he's made just four appearances having slipped down Brendan Rodgers' pecking order at Celtic Park.
Fabio Sturgeon (R) in action for Belenenses
Dundee United have subsequently attempted to lure Mackay-Steven back to Tannadice for the rest of the season as they look to win promotion, but The Express report that Celtic will reject the idea of him leaving on loan.
All of Mackay-Steven's appearances this season came last month, and he appears to be working his way back into Rodgers' plans, with this latest development another sign that he can still have a future under the Celtic boss.
The report adds that Celtic have no interest in signing Belenenses winger Fabio Sturgeon, despite suggestions that he could be a target for the Bhoys.
The Portuguese winger has an English father and has been heavily linked with a move to the UK in recent years, with The Mirror claiming in October 2014 that Liverpool – then managed by current Celtic boss Rodgers – were interested in signing Sturgeon.
Sturgeon has been suggested as a potential Celtic signing due to Rodgers' long-standing interest in the 22-year-old wide man, but it's believed that he isn't currently on the Bhoys' radar, with less than two weeks to go until the transfer deadline.
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