Parramatta coach Michael Hagan has been admitted to hospital because of illness, but is expected to coach the Eels against the Sydney Roosters in their crucial NRL game on Sunday.

Hagan is believed to have woken up feeling dizzy on Friday morning before checking himself in to The Hills Private Hospital in western Sydney with vertigo the initial diagnosis.

He will undergo tests and remain in hospital overnight for observation while assistant coaches Matthew Cameron and David Fairleigh oversee the teams final training run on Saturday.

The illness, though, is not expected to keep the coach from guiding his side in Sunday's clash with the Roosters at the Sydney Football Stadium.

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