Shakhtar Donetsk striker Eduardo says Arsenal should have fought more to keep hold of their stars.

Eduardo, who joined Arsene Wenger's side from Dinamo Zagreb in 2007 before moving to Shakhtar Donetsk in 2010, believes that Arsenal will never challenge for the title if they keep selling their best players at the end of each season.

"It's a big mistake to sell them - they were the most important players last season. When you lose players like that, your chance of finishing in the top four is less," he said.

"Every player comes to Arsenal as a simple player and Arsenal make them into a big player. But they can't keep everyone together to fight for titles. Every year it's similar - they lose players, buy players, make them class players and the next year they sell again. They are always in the same place."