Kilmarnock's Youssouf Mulumbu is being tracked by each of the top four teams in the Ladbrokes Scottish Premiership.
Mulumbu is a free agent in the summer and Killie boss Steve Clarke admits it is highly unlikely that he will be able to persuade the midfielder to stay at Rugby Park beyond the summer.
The Democratic Republic of Congo international is likely to have a host of clubs outwith Scotland chasing his signature but Celtic, Rangers, Aberdeen and Hibernian are all keeping tabs on the 31-year-old.
Youssouf Mulumbu has been a stand-out performer since joining Kilmarnock from West BromiPhone transfer software
Mulumbu has been a stand-out operator since agreeing to follow his former West Brom manager Clarke to Ayrshire earlier in the season and was almost prised away from Killie in January when a deal to take him to French club Bordeaux broke down as the transfer deadline loomed.
Having proved his fitness following an injury-ravaged spell at Norwich, Mulumbu's availability will spark interest south of the border, but the two Glasgow clubs could easily enter the frame, too. Mulumbu scored the winning goal when Killie beat Celtic in February and was a stand-out as Clark's team won at Ibrox last month.