5 of the best free transfers of the January window 

#4 Zinedine Machach (Napoli)

Machach has the skill set needed to be Hamsik's long-term heir at Napoli

The 22-year-old French central midfielder and Napoli new signing, Machach is a promising player who has been signed by the Italian league leaders on a free transfer from Toulouse on a four-year deal.

The youngster began his career at the French club, Toulouse in 2015 and spent the next season on loan to Marseille before heading back to Toulouse for six months and moving to Italy.

The talented and fiery central midfielder could be a long-term replacement for club captain Marek Hamsik. Possessing great composure on the ball, the French player can prove to be a great signing and a lucrative investment for the club in the future.

He will act as a rotational player for the rest of the season but could soon make a name for himself with his fluent passing and creative gameplay in the final third.

Aged 22, he still has a lot to learn and comprehend about the Italian game and a challenging campaign will be the perfect start to life in Naples for the promising young player.