Milan's 100 per cent start to the season in Serie A was ended by Roma after a 3-3 draw in which Zlatan Ibrahimovic scored twice.
Gianluigi Donnarumma has enjoyed a fine start to the 2020-21 season but could now sit out games due to coronavirus.
Jadon Sancho appears set to stay at Borussia Dortmund until at least the end of the season.
Borja Mayoral joined Roma from Real Madrid this month but the Spanish forward has claimed things could have turned out differently.
Real Madrid could reportedly turn to Borussia Dortmund star Erling Haaland to bolster their attack.
Real Madrid are reportedly trying to prise France sensation Eduardo Camavinga from Ligue 1 side Rennes.
Emerson Palmieri remains a Chelsea player for now and Italy boss Roberto Mancini is disappointed a transfer did not materialise.
After impressing on loan last season, Roma have brought Chris Smalling back to the Italian capital on a permanent deal.
Three new faces have come in at Bayern Munich, while Manchester United are expected to add to the acquisition of Alex Telles.
RB Leipzig have improved their attacking options by bringing in Justin Kluivert on loan from Roma.