Radja Nainggolan
Radja Nainggolan’s arrival at Stamford Bridge is likely to put Nemanja Matic’s future at the club in doubtGetty

Radja Nainggolan is close to becoming Chelsea's first summer signing as incoming manager Antonio Conte begins his restructuring of the club after they failed to mount a successful title defence. The Blues are on course to finish outside the top six after a disappointing Premier League campaign, which also saw Jose Mourinho being dismissed midway.

According to the Daily Mail, talks between the AS Roma midfielder and the Blues are at an advanced stage with the clubs set to agree a transfer fee in the region of £26m ($37.8m) to complete the deal before the start of the European Championship finals in France in the summer. The Italian manager has reportedly made the Belgian midfielder his priority signing and is desperate to conclude the deal at the earliest.

Nainggolan has been ever-present in the Serie A club's midfield this season contributing five goals in 32 league appearances thus far. The central midfielder's arrival at Stamford Bridge is likely to put the future of Nemanja Matic in doubt following a poor season, which was one of the reasons for the soon-to-be-deposed Premier League champions' downfall.

According to the Mirror, the Belgium international is keen to move to the Premier League in the summer, and after negotiations, he has agreed a five-year deal with the Blues ahead of his switch. He is likely to partner Cesc Fabregas at the heart of the midfield, in what is likely to be a new look Chelsea as they look to get back to competing for the title and playing in Europe.

Nainggolan, however, does have a drawback in terms of discipline, and that could be a problem in the Premier League. The midfielder has picked up 12 yellow cards and one red card in 39 appearances, which will be a cause for concern for Conte.