The Foxtel A-League All-Stars have been dealt a blow with confirmation that the competition's three biggest names are all unavailable.

Sydney FC striker Alessandro Del Piero, Western Sydney Wanderers midfielder Shinji Ono and Newcastle Jets forward Emile Heskey will not play for the All-Stars against Manchester United at ANZ Stadium on July 20 for various reasons.

"The fans and their votes are what have brought the Foxtel A-League All Stars into existence and we have placed fan engagement at the heart of the All Stars project," said Football Federation Australia CEO David Gallop.

"Alessandro, Shinji and Emile have turned on great performances and brought a huge global and national profile to the Hyundai A-League, so naturally the fans wanted to see them face Manchester United.

"But we respect the fact that their personal circumstances at this time mean the All Stars game arrives at a difficult period for them to manage a one-off appearance."

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