Toronto's police chief will not testify at a senior officer's disciplinary hearing that relates to police practices at the G20 protests.

Lawyers for complainants at Supt. David "Mark" Fenton's hearing argued Monday that it's vital that Chief Bill Blair explain his involvement in Fenton's decision to order mass arrests during the G20 summit in 2010.

But counsel for Blair said their evidence would be irrelevant and that the police chief could not be compelled to appear.

The judge ruled in favour of not forcing the outgoing chief to testify.

Retired deputy chief Tony Warr also doesn't have to testify.

The complainants should have called Blair and Warr when they were making their case, not at this stage in the case, said the judge, former Superior Court Justice John Hamilton.

The judge pointed out the information that Warr had ordered Fenton to "take back the streets" was in the original police report which came up in discovery. So they should have called him before they closed their case.

Fenton has pleaded not guilty to five Police Services Act charges stemming from two "kettling" incidents that occurred over the summit weekend.

The incidents resulted in the largest peacetime arrests in Canadian history.

Fenton has said his superiors were fully aware of the manner in which he had ordered the arrests, had not stopped him and noted that Blair thanked him for "saving the city."