The summer transfer window has now closed, with Manchester City having again focused on bolstering their defence first and foremost.

Nathan Ake and Ruben Dias arrived for a combined sum of more than £100m, while Ferran Torres was another notable signing. Attention will now switch to the January window as Pep Guardiola's side attempt to win back the Premier League title.

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

Friday morning's Manchester City transfer talk news roundup:

Chelsea join race for Borussia Dortmund's Erling Braut Haaland?

Chelsea have reportedly joined the race to sign Borussia Dortmund forward Erling Braut Haaland.

Despite a recent injury, the Norway international's prolific start to life at the Westfalenstadion has continued into the 2020-21 campaign, with Haaland boasting 17 goals in all competitions for Dortmund this term.

Manchester City have been strongly linked with a swoop for Haaland as Sergio Aguero runs down the final few months of his deal, but the Citizens are expected to face stiff competition for Haaland's signature.

Haaland's father - former Man City defender Alf Inge Haaland - has previously insisted that his son is happy at Dortmund, but 90 min reports that Chelsea are confident about their chances of securing the striker's signature in 2021.

The report claims that the Blues have already touched base with Haaland's entourage to register their interest, with Real Madrid and Barcelona - who have both been tipped to swoop for Haaland - expected to prioritise moves for Kylian Mbappe and Lautaro Martinez respectively.

Dortmund would supposedly demand a nine-figure sum for Haaland, who is tied down to the Bundesliga giants until the end of the 2023-24 campaign.

Tottenham Hotspur, Manchester City 'keeping tabs on Marten de Roon'

Tottenham Hotspur and Manchester City are both reportedly keeping a close eye on Atalanta BC midfielder Marten de Roon.

The 29-year-old has previous experience of the Premier League, having spent the 2016-17 season with Middlesbrough before returning to Atalanta following the English club's relegation.

The Netherlands international has been a key player for his Italian club over the last four campaigns, and according to 90 min, both Tottenham and Man City are interested in bringing him back to the Premier League.

The report claims that De Roon's performances in last season's Champions League caught the attention of Pep Guardiola's side, who have an interest ahead of next summer's transfer window.

Spurs, meanwhile, have also been mentioned as potential suitors, with head coach Jose Mourinho said to be keen to bring another central midfielder to the Tottenham Hotspur Stadium.

De Roon, who has a contract with Atalanta until the summer of 2024, has scored once in 15 appearances for La Dea during the 2020-21 campaign.

More transfer news from Manchester City:

Manchester City looking to poach Riqui Puig from Barcelona?
Manchester City and Bayern Munich reportedly both hold an interest in Barcelona starlet Riqui Puig, who is out of contract in Catalonia next summer. Read more.