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

The Spanish champions spent big on Antoine Griezmann during the summer but missed out on a big-name striker in January, leading to speculation that they could splash the cash again when the window reopens.

Here, Sports Mole rounds up the latest transfer news from the Camp Nou.

Friday morning's headlines:

Manchester United, Manchester City enquire about Barcelona's Antoine Griezmann?
Manchester United and Manchester City reportedly ask about the availability of Antoine Griezmann, who has struggled during his first year at Barcelona. Read more.

Newell's Old Boys chief opens door to return of Barcelona's Lionel Messi
Newell's Old Boys vice-president Cristian D'Amico reiterates that the door remains open for Barcelona forward Lionel Messi to return to the Argentine outfit. Read more.

Shirt numbers available to Antoine Griezmann at Arsenal
Amid reports linking Antoine Griezmann with a move to Arsenal, Sports Mole looks at the shirt numbers that could be available to the forward in London. Read more.

How Arsenal could line up with Antoine Griezmann
Amid speculation linking Arsenal with a move for Antoine Griezmann, Sports Mole looks at how the Gunners could line up with the Frenchman in their ranks. Read more.

Philippe Coutinho 'takes 50% pay cut to stay at Bayern until end of season'
Bayern Munich reportedly agree a deal to keep Philippe Coutinho on loan from Barcelona until the end of the season which will see the Brazilian take a 50% pay cut. Read more.