Chris Sutton says the fitness of Aaron Ramsey will be key in the title race between Rangers and Celtic.
Wales star Ramsey signed on loan for the Ibrox club on deadline day, with a short-term deal agreed with parent club Juventus.
Ramsey made his Gers debut on Sunday afternoon in the 5-0 win over Hearts in Glasgow, coming off the bench for the final 15 minutes against the Edinburgh club.
The result kept the pressure on Old Firm rivals Celtic, who themselves had run out 4-0 winners over Motherwell earlier in the day.
Celtic dispatched Rangers 3-0 in midweek, with Ramsey not quite fit enough for a place on the bench having only signed just over 24 hours before.
Hoops favourite Sutton says Ramsey is a "brilliant" player but believes there is only a title race on if he remains fit.
After 25 games, Celtic have 60 points, with Rangers just one behind.
“Let’s wait and see,” Sutton said on BBC 5Live when asked if he was a good signing for Rangers.
“He’s had injury issues. I’m a big fan of Ramsey, a brilliant player over the years. If he does stay fit, Rangers and Celtic have a title race on.”
Sutton posted a cryptic tweet on deadline day amid news of Ramsey's move to Ibrox. He wrote: "I remember when Rangers thought they’d signed John Hartson… what happened next?"
The tweet was in reference to former Wales international Hartson nearly joining the Light Blues in 2000 before failing a medical. He subsequently joined Celtic a year later.
Ramsey himself was delighted to make his bow in front of a packed house.
"It was the plan to get some minutes in the legs today, 15 or 20 minutes," he explained.
"I haven't played a lot of football since November, so it was good to get back out there on the pitch.
"Over the next week or so, there's so many games coming up, so there's a lot of opportunities to get some minutes in and progress over the coming weeks.
"They're [play-offs] huge games for us, for Wales, but they are in March. We're in February now.
"I'm fully focused on getting back to full fitness and helping my team-mates as much as I can over the coming weeks.
"There's a lot of football to be played. We're playing in different cup competitions over the next few weeks which are really important so we need to be fully focused on that. I'll give my all."
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