Although talks over a new contract for Cole have broken down the Frenchman is hoping his show of support will persuade the 24-year-old to sign a new deal.
Wenger is furious that the hearing is taking place in the week of the FA Cup final and Arsenal have asked the Premier League to delay announcing the verdict until after Saturday's showdown.
Chelsea's chief executive Peter Kenyon, manager Jose Mourinho and Cole will all testify at the inquiry, which has to decide whether either party is guilty of inducing the player to break his Arsenal contract.
The charge relates to a meeting in a London hotel in February attended by Kenyon, Mourinho, agent Pini Zahavi, and Cole. The meeting, it is alleged, was a breach of rules which govern contact with players contracted to another club.
Stopping clubs from buying and selling during one transfer window would be a severe penalty.
But if Chelsea are found guilty after the two-day inquiry they are extremely unlikely to face anywhere near the kind of penalty suggested by Blatter. The most likely penalty is a fine.
Mourinho will attend the hearing before setting off on a five-day trip to South Korea where the team will play Asian champions Suwon Bluewings.
