Cesc Fabregas is a step closer to becoming a Barcelona player after starting the first of two medicals in the Spanish city.
On Sunday, Arsenal and Barca confirmed an "agreement in principle" over the sale of Fabregas.He will discuss personal terms and is expected to be unveiled at 1300 BST after signing his contract.
It means the 24-year-old is set to return to the team he left as a 16-year-old in 2003.
"We understand Cesc's desire to move to his home-town club and have now accepted an offer from Barcelona," said Arsenal manager Arsene Wenger.
Analysis
Continue reading the main story Arsenal have lost one of their most talented ever players, but Fabregas's departure will provoke as much relief as it does disappointment among the club's fans. The way he and Barcelona bullied Arsenal into submission reflected poorly on both. Arsenal deserved better and it is now time for them to move on. Finding a replacement for Fabregas (and soon Samir Nasri) will not be easy, and one wonders how much damage this saga has done to Arsene Wenger's motivation"We thank Cesc for his contribution at Arsenal and wish him future success."
Barcelona have been chasing Fabregas since last summer. As BBC Sport revealed on Friday, Arsenal will receive a guaranteed £30m transfer fee, with a further £5m dependent on the number of games played and trophies won by the Spaniard during his time at the Nou Camp.
News of the deal was confirmed at half-time of the first leg of Barcelona's Spanish Super Cup match against Real Madrid on Sunday, which ended 2-2.
The Spanish champions stated on their official website that Fabregas is scheduled to sign his contract at 1130 BST before being unveiled to the media at 1300 BST. Meanwhile, Wenger will have to face the media ahead of Tuesday's Champions League qualifier against Udinese.
Fabregas trained with his Arsenal team-mates for the final time on Friday morning and was not part of Wenger's squad for Saturday's Premier League opener against Newcastle, which finished 0-0.
BIGGEST BRITISH TRANSFERS
- £80m Cristiano Ronaldo (Man Utd - Real Madrid)
- £50m Fernando Torres (Liverpool - Chelsea)
- £38m Sergio Aguero (Atletico Madrid - Man City)
- £35m Andy Carroll (Newcastle - Liverpool)
- £32.5m Robinho (Real Madrid - Man City)
The Spaniard, who has 58 caps for his country, made 303 appearances for the Gunners during his eight-year spell in north London, scoring 57 goals in all competitions.
In October 2003, he became Arsenal's youngest first-team player when he made his debut against Rotherham United in the Carling Cup aged 16 years and 177 days.
He also became the club's youngest goalscorer when he netted against Wolves in a 5-1 win that December. Fabregas was part of the Arsenal team that beat Manchester United on penalties to win the 2005 FA Cup, which turned out to be his only major trophy with the Gunners.
He went on to become Arsenal captain in November 2008. Striker Robin van Persie is likely to take over as the new permanent Arsenal skipper, although he will be suspended for the Udinese match after being shown a red card against Barcelona in the Champions League last season.
When quizzed on the futures of Fabregas and Samir Nasri - who BBC Sport understands is close to a move to Manchester City - at a news conference on Friday, Wenger had said he expected "nobody to leave" Arsenal.