Former Arsenal and Barcelona midfielder Aleksander Hleb believes Pep Guardiola was able to perform, only because of the great players at his disposal.
The 31-year-old Belarus international said that while the Spaniard is a good coach, his success was due to the stable of stars at Camp Nou, and as such, his former mentor could not be regarded as one of the world's best.
"I learned more from [Arsene] Wenger than Guardiola, but Pep is a good coach," Hleb told Esports en Xarxa, as quoted by ESPN. "Guardiola is not the best coach in the world.
"He coached the best team in the world, with the best players, and that's why he won."
After moving to north London from VFB Stuttgart in 2005, Hleb enjoyed three successful seasons with Arsenal before leaving the Emirates Stadium for Barcelona in a €17million deal in 2008.
However, the midfielder struggled to break into Guardiola's first-team squad, making only 36 appearances over the next four years - a possible incentive for his anti-Pep stance.
"It's hard not to win with a team like that," he continued. "[Tito] Vilanova will have the greatest success.
"The best coaches in the world are [Jose] Mourinho, [Sir Alex] Ferguson and [Arsene] Wenger."
Hleb was loaned back to Stuttgart while in Spain, and also enjoyed temporary spells at Birmingham City and Wolfsburg, before making a permanent move to Russian side Krylia Sovetov Samara.
However, his stay there lasted for just eight games, prior to a return to Belarus, where he now enjoys his football with Champions League minnows BATE Borisov.