Bernard Tomic has launched a breathtaking attack on Lleyton Hewitt, accusing Australia's Davis Cup captain of favouring certain players and warned the best players would not play for Australia while Hewitt was there.

Tomic was defeated 6-2 6-4 7-6 (7-3) by world No.7 Marin Cilic on Monday night on his return to the tournament, a year after losing in qualifying for his home grand slam.

He then closed the door on a Davis Cup return under Hewitt and exposed deep rifts among Australian players.

Tomic said he spoke for Thanasi Kokkinakis and Nick Kyrgios in saying they would not play for Australia with Hewitt there.