Shane Warne conceded the worst figures of his Twenty20 career in last night's Big Bash derby in Melbourne - and dropped a sitter.

The Melbourne Stars captain conceded 41 from his two overs as his side lost by eight wickets to the Melbourne Renegades.

Aaron Finch did most of the damage, smashing an unbeaten 111 from only 65 balls.

Warne, who was discussing the possibilty of a Test comeback earlier this week, went into the game warning the Renegades about his new 'disco ball'.

He later described the performance as "a bad day at the office".