The January transfer window is open, and there is plenty of gossip and speculation around the world of football. Here is the latest transfer news and rumors from around the globe.

• Barcelona make Isak their No. 1 target: Newcastle United striker Alexander Isak is now top of Barcelona's wanted list. The Blaugrana see the 25-year-old as the perfect successor to Robert Lewandowski, and he's now moved ahead of Sporting CP's Viktor Gyökeres and Manchester City's Erling Haaland in their list of targets.

• Man United midfielder Mainoo linked with Chelsea: Manchester United and England midfielder Kobbie Mainoo is a target for Chelsea, according to The Sun. The 19-year-old has been stalling on contract talks and is valued at £60m. United boss Ruben Amorim is keen to keep his best stars and says Mainoo is "improving," but United need to part with one or two of their homegrown players to keep in line with Premier League profit and sustainability rules.

• AC Milan move ahead of Barcelona in race for Rashford: Gazzetta dello Sport believes that AC Milan have moved ahead of Barcelona in the race to sign striker Marcus Rashford. Manchester United prefer a loan without an option to make the deal permanent, and with Barcelona still encountering problems registering existing players, Milan are better placed to cover a bigger proportion of the 27-year-old England international's huge salary.

• Barcelona ponder move for AC Milan winger Leão: Talks among the Barcelona hierarchy are ongoing as they ponder a potential move for AC Milan winger Rafael Leão, reports Diario Sport. The 25-year-old is on the LaLiga club's shortlist, but there are some disagreements with Blaugrana coaches believing that his profile is too similar to Lamine Yamal, which has raised concerns about having two players who contribute less defensively.

• Arsenal, Liverpool and Man United tracking Wolves midfielder Gomes: Arsenal, Liverpool and Manchester United are all tracking Wolverhampton Wanderers midfielder João Gomes, reports The Sun. The 23-year-old, who has won nine full caps for Brazil, has had an impressive season despite Wolves' relegation fears. Gomes has a contract until 2028 and the club are trying to agree improved terms to ward off interest this month.