Bayern Munich are reportedly keeping an eye on imposing Napoli centre-back Kalidou Koulibaly as they look to strengthen defensively in the summer in preparation for the transition between Pep Guardiola's reign and the Carlo Ancelotti era.

According to the Daily Mail, Bayern are interested after a string of impressive performances from Koulibaly in Serie A, where Napoli are battling to break Juventus' domestic stranglehold, and in the Europa League prior to i Ciucciarelli's early elimination at the round of 32.

Juventus FC v SSC Napoli - Serie A

The French-born Senegal international was linked with the likes of Everton and Southampton last season, but is on the radar of much bigger clubs, with Manchester United rumoured to be rivalling Bayern.

However, it must also be noted that reports suggest the player and his agent, Bruno Satin, could use the interest from elsewhere to strengthen their hand while negotiating a new and improved contract at Napoli.

ACF Fiorentina v SSC Napoli - Serie A

Talks are ongoing, although Satin is additionally said to be ascertaining just what kind of offer would be considered acceptable by the club should a potential buyer come in with a formal approach.

As far as current Bayern defenders are concerned, there was good news regarding the fitness of Jerome Boateng this week after the 2014 World Cup winner returned to training.

Boateng suffered a groin injury in late January and hasn't been seen since. It initially threatened to rule the player out of action for four months, potentially even putting his place with Germany at Euro 2016 in jeopardy, but he appears to be ahead of schedule.

"It's good news. Of course I want to return as soon as possible, but I don't want to promise anything, I mustn't overdo it," a happy player told this week. "I hope I can return and help if we get through to the [Champions League] semi-finals."

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