The buildup to the summer transfer window has now begun, with rumours and speculation continuing to swirl as Manchester City eye possible reinforcements.

The 2018-19 champions did not bring in a single player during the January transfer window, despite suffering a defensive shortage for much of the campaign so far.

Here, Sports Mole rounds up the latest news on possible comings and goings at the Etihad.

Saturday morning's Manchester City transfer talk news roundup:

Manchester United trying to poach 600-goal Manchester City prospect?

Manchester United are allegedly attempting to secure a deal for Manchester City youth player Charlie McNeill.

Despite netting in excess of 600 goals in the youth ranks at the Etihad Stadium, the 16-year-old has rejected the opportunity to pen professional terms.

Although a compensation fee will be required if he moves elsewhere, the Daily Mail claims that United are interested in the teenager.

While a seven-figure fee has been mentioned, it is suggested that the two clubs are yet to agree a compromise over the sum which will be paid to City.

McNeill, who does not turn 17 until September, is a boyhood United fan, increasing the likelihood of a transfer to Old Trafford.

Kalidou Koulibaly refuses to rule out Napoli exit

Kalidou Koulibaly has admitted that he 'cannot promise' that he will end his career at Napoli amid suggestions that the centre-back could be on the move this summer.

The 29-year-old has again been an important figure for his Italian club during the 2019-20 campaign, making 30 appearances in all competitions.

The Senegal international has a contract in Naples until June 2023, but the speculation surrounding his future has gathered pace in recent weeks, with Manchester City thought to be interested in a summer deal.

Koulibaly has conceded that he could be on the move ahead of the 2020-21 campaign, and Manchester United and Chelsea have also both previously been linked with his services.

"I would love to stay at Napoli for life, but I can't make promises," Koulibaly told Radio Kiss Kiss. "I am part of the project and at the end of the season I will speak to the directors. Right now, my mind is 100% on the pitch."

The former Genk youngster is allegedly valued by his current side in the region of £90m, although a recent report claimed that he could be available for £65m this summer.

More transfer news from Manchester City:

Valencia 'refusing to budge over Ferran Torres fee'
Valencia are reportedly refusing to lower the valuation of Manchester City target Ferran Torres, said to be set at £73m. Read more.