Harry Kewell has revealed he still feels responsible for John Aloisi's sacking as Melbourne Heart coach as the club seeks to avoid an unwanted A-League record.

Failure to win Friday night's match against Newcastle would make it 20 games without a victory - the longest stretch in A-League history.

The winless streak cost Aloisi his job last month and, in an interview to be broadcast on Friday on SBS, Kewell said a number of players in the Heart dressing room had not given their all for Aloisi.

"If a manager leaves, you've got to feel some responsibility," Kewell said.

"We did look at ourselves and we realised, maybe not all of us put in 100 per cent, myself included."