Agassi took on his first coaching role last May, when he joined Djokovic's team as head coach, but the duo split in March as the 12-time grand slam winner struggled to recover after undergoing elbow surgery.
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The American former world number one, who retired in 2006, said his first steps into coaching were "challenging, interesting and educational".
"When I played I never felt pressure but a lot of stress. As a coach I never felt stress but a lot of pressure so that was an interesting difference," Agassi told Britain's The Telegraph newspaper. "As a coach you have to make sure you're saying the right thing at the right time or not saying the wrong thing at the wrong time — there was a lot of pressure to it."
The 48-year-old did not rule out working with Djokovic again despite the Serb reuniting with his long-time coach Marian Vajda.
"If there are ways that I could help him (Novak Djokovic), he'd have to let me know," added Agassi.
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Agassi, a Wimbledon champion in 1992, expressed his willingness to coach anyone who needed it but was unsure about Australian maverick Nick Kyrgios. "Would I help someone if I could help someone? Of course I would," said Agassi. "What I think of him (Kyrgios) and his ability and upsides are different to saying you could work with him. You don't know if somebody wants to be worked with."
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