MELBOURNE's trainers, coaches and a few players searched unsuccessfully for several minutes for draftee Mitch Hannan's two front teeth after they were knocked out in a training drill on Tuesday.

The 22-year-old came off second best in a tackling drill when he copped a stray elbow from teammate Pat McKenna towards the end of the session.

Hannan's two teeth were partially dislodged from the force of McKenna's elbow and he was taken to visit the dentist at the end of the training session.

"His two front teeth – half of them are gone so he should've been wearing a mouthguard so there's a tip," teammate Christian Petracca said.

"The number one rule, especially in juniors, was no mouthguard, no play.

"It wasn't a high intensity drill and it was up to him whether he wore a mouthguard and he obviously paid the consequences."

Out-of-favour forward Jack Watts, who was one of the players searching for the missing teeth, did extra contested work as he bids to win his place back in Melbourne's side.

Watts did not complete the running component at the end of the session and left the track before his teammates and went home sick.

The Demons trained for around two hours in warm conditions out at Casey Fields and there were plenty of willing players cracking in and trying to impress coach Simon Goodwin and the rest of the match committee.

Star forward Jesse Hogan received treatment on his left hip, which is part of his ongoing management, and rookie Joel Smith left the field with a sore right foot before returning a few minutes later.

Watts, who has not been selected for the Demons' two JLT Community Series games, has taken significant strides in his training standards in the past fortnight and looked more engaged throughout the session.

That theme continued at the end of training when Watts worked with assistant coaches Troy Chaplin and Ben Matthews on contested marking before following up to win the ball on the ground.

Watts would fly for the ball on top of the 'speccy bag' and then follow up and win the footy under pressure, from the coaches with buffeting bags, immediately after contesting the mark.

The mobile forward is hoping to break into a side that has won its past two pre-season games against the Western Bulldogs and Carlton; the two victories highlighting the Demons' improved depth.

Clayton Oliver, Jack Trengove, Angus Brayshaw and Billy Stretch were among the standouts at training on Tuesday morning.

Melbourne plays West Coast at Domain Stadium on March 9 in its final dress rehearsal ahead of a round one match-up against St Kilda on March 25.