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.

Sunday morning's Manchester City transfer talk news roundup:

Kalidou Koulibaly pours cold water on Liverpool, Man Utd links

Kalidou Koulibaly has insisted that remains focused on his time with Napoli amid persistent speculation linking the defender with a move away this summer.

Koulibaly has been linked with several high-profile clubs having starred in the heart of the Napoli defence, with Manchester United, Liverpool, Manchester City, Paris Saint-Germain and Barcelona all rumoured to be weighing up approaches.

A recent report claimed that Liverpool and Man United had made contact with Napoli regarding a proposed summer move, but Koulibaly has affirmed that he remains committed to the Serie A outfit.

Speaking to La Gazzetta dello Sport, the Senegalese centre-back said: "In football, you never know what happens. I never spoke to Napoli about leaving. If we have to find a solution, we will find it, but I have never talked about the transfer market.

"I also read in the newspapers about my future. But I only want to think about playing, I am 100% [committed to] Napoli and it bothers me to be linked, every day, to this or that European club.

"We will see what the president (Aurelio De Laurentiis) will decide and if he proposes to extend my contract, that would allow me to end my career here.

"At the moment, I still have a three-year contract and I am not thinking of anything else but Napoli."

Koulibaly, who has turned out 19 times in the league this season, would supposedly cost in the region of £72m despite the financial implications of the coronavirus pandemic.

Manchester City to offer Sergio Aguero new deal?

Manchester City have reportedly not ruled out the possibility of keeping Sergio Aguero on the books at the Etihad until the end of the 2021-22 season.

Despite being currently sidelined with a knee injury, Aguero has enjoyed yet another prolific season with the Citizens, notching up 23 goals across all competitions.

With the Argentine's current deal at the Etihad set to expire next summer, Aguero has been tipped to move back to his native Argentina and rejoin boyhood club Independiente for the latter stages of his career.

However, The Mirror claims that City are open to offering Aguero a new deal if he can continue his goalscoring form into next season.

While Gabriel Jesus has been enjoying a consistent run in the team in the wake of Aguero's injury, the report claims that the Brazilian is yet to convince Pep Guardiola that he is capable of filling Aguero's boots in the long run.

Since arriving in Manchester from Atletico Madrid in 2011, Aguero has amassed 254 goals in 370 appearances for City and has lifted the Premier League trophy on four occasions.

More transfer news from Manchester City:

Manchester United 'make £58m Milan Skriniar bid'
Manchester United make a £58m offer for Inter Milan defender Milan Skriniar, according to a report. Read more.

Manchester City, Juventus to rival Liverpool for Thiago Alcantara?
Manchester City and Juventus are reportedly contemplating whether to rival Liverpool in the race to sign Bayern Munich midfielder Thiago Alcantara. Read more.

Manchester City offer two players in part-exchange for Kalidou Koulibaly?
Manchester City are reportedly prepared to include Nicolas Otamendi and Oleksandr Zinchenko in part-exchange for Napoli defender Kalidou Koulibaly. Read more.