Usman Khawaja has denied his exuberant coin toss in the Marsh Cup final was a sly dig at critics of his body language, with the veteran batsman adamant he can still force a return to the Test arena.

Khawaja has signed an extension to his current deal with the Sydney Thunder, which will keep him at the BBL franchise for the next four years.

Usman Khawaja has extended his contract with the Sydney Thunder. Credit:AAP

He is the only foundation player still at the Thunder, having played in their first match back in 2011 alongside David Warner and Chris Gayle.

The 32-year-old remains hopeful of cracking the Australian side again but will have to be patient, with the current top three of David Warner, Joe Burns and Marnus Labuschagne likely to be set in stone for some time after a dominant series win over Pakistan.