Brazilian appears to confirm move in Instagram message.
Samuel Eto'o will now play in the Italian league after he joined Everton on a free transfer from Chelsea in August.
The 33-year-old Eto'o joined Everton on a free transfer last August, and scored four times in 20 appearances before moving back to Italy, where he used to play for Inter Milan.
Capped 116 times, Samuel Eto'o won two Africa Cup of Nations titles in 2000 and 2008, a competition in which he is the all-time leading scorer with 18 goals.
Cameroon great Samuel Eto'o has signed a two-year contract at Everton and could make his debut against his former club on Saturday when Chelsea visit Goodison Park in the Premier League.
The Cameroon Football Federation announced the move and said it was a decision taken by the sports ministry. Midfielder Stephane Mbia replaces Samuel Eto'o.
Samuel Eto'o is available for free after his one-year contract with Chelsea expired and Liverpool see him as a potential candidate to bolster their attack
Xavi made his first team debut for Barca when he was just an 18-year-old, but since then his passing ability has developed into an artform and he, more than anyone, can be seen as the architect of the football that made Barcelona the top club in Europe and has made Spain both World and European Champions.
Fabregas was involved in all three of Barca's goals as they moved four points clear of Atletico Madrid in second place with a convincing 3-0 win over Celta Vigo on Tuesday.
The result means Barca were unable to equal Real Madrid's record start to the campaign of nine successive wins, reports Xinhua.
The Spanish champions have racked up five straight league wins, as well as beating Ajax 4-0 in their Champions League opener and regaining the Spanish Super Cup with an away goals victory over Atletico Madrid.
The injury will rule Jordi Alba out of Barcelona's Champions League opener at home against Ajax on Wednesday and its second group phase match at Celtic on Oct. 1.
After joining from Lyon in 2007, Abidal played 125 league games for Barcelona, helping the Catalan club to win four league titles and two European Cups. He forged a close bond with former coach Pep Guardiola, who is now in charge of Bayern Munich.
Gerardo Martino had handed a first start to Neymar as the Brazilian and Lionel Messi lined up for the first time in a competitive match since the former's switch from Santos.
Messi has now played the 90 minutes in just one of Barcelona and Argentina's last 27 matches stretching back to when he initially picked up a hamstring strain against Paris Saint-Germain in April.
As much as the Argentine is often lauded for not being the stereotypical egotistical modern footballer, the success that both player and club have had in recent years has very much depended on building the side around Lionel Messi's talents.
The 26-year-old, who was courted by Manchester United this summer before opting to remain at the Nou Camp, will miss Spain's midweek friendly against Ecuador but could also skip the start of the new season next weekend.
The 26-year-old Fabregas, who has been pursued by Manchester United this summer, scored one goal and set up the other two in the match.