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.

Thursday morning's headlines:

Arsenal 'make contact with £40m Sporting Lisbon starlet wanted by Barcelona'
Arsenal reportedly make contact with 17-year-old Sporting Lisbon winger Joelson Fernandes, who has a £40m release clause and is also wanted by Barcelona. Read more.

Arthur 'performs U-turn on Barcelona future amid Juventus links'
Barcelona midfielder Arthur is reportedly now willing to consider a move to Juventus, having previously been steadfast in his desire to stay at Camp Nou. Read more.

Juventus make enquiry about Arsenal captain Pierre-Emerick Aubameyang?
Juventus reportedly join Barcelona and Inter Milan in the running to sign Arsenal captain Pierre-Emerick Aubameyang, who is approaching the final year of his contract. Read more.

Barcelona interested in Tanguy Ndombele, Philippe Coutinho swap with Tottenham?
Barcelona are reportedly interested in signing Tottenham midfielder Tanguy Ndombele, but only part of a swap deal with Philippe Coutinho or Nelson Semedo in return. Read more.

Real Madrid, Barcelona interested in Arsenal's Matteo Guendouzi?
Spanish giants Real Madrid and Barcelona are reportedly keeping tabs on Matteo Guendouzi amid reports that Arsenal could look to sell the midfielder this summer. Read more.

Barcelona to sign Edinson Cavani this summer?
Experienced striker Edinson Cavani emerges as a target for Barcelona, according to a report. Read more.

Tanguy Ndombele 'told Jose Mourinho he never wants to play for him again'
Tottenham Hotspur midfielder Tanguy Ndombele told Jose Mourinho earlier this week that he never wants to play for him again, according to a report. Read more. body check tags ::