The Senegal international, 26, has been with Racing for three years and is being made available for the summer market.
Any move to Bolton, however, will depend on the Trotters beating the drop on Sunday.
Tribal Football Staff are dedicated to the football tribes from all over the world. Our team is passionate about delivering football news to our hundreds of thousands of followers in all the corners of the globe. Football is life, It never stops, Neither do we.