MELBOURNE, AUSTRALIA - MARCH 28: Australian coach Darren Lehmann and Glenn Maxwell of Australia look on during an Australian nets session at Melbourne Cricket Ground on March 28, 2015 in Melbourne, Australia. (Photo by Quinn Rooney/Getty Images)

Australian coach Darren Lehmann has a pretty simple message for Test hopeful Glenn Maxwell.

Score runs.

Maxwell wasn't selected for Australia in their third Test victory over South Africa, meaning the 28-year-old hasn't represented Australia in a Test since November 2014.

Lehamnn says the Victorian wasn't even considered for a Test call-up, and has some simple reasoning behind the decision.

“(Maxwell) hasn’t made a hundred for two years,” Lehmann said.

“Are you going to pick a bloke who hasn’t made a hundred in two years?”

Despite averaging 43.42 over the past two Sheffield Shield seasons, Maxwell has failed to score a century, with a high score of 98 his best return.

The last time the big-hitter scored triple figures in Shield cricket came in February 2014, when he scored 119 against South Australia batting at No.6.

After comments from Maxwell questioning why captain and wicketkeeper Matthew Wade was batting above him in the batting order, Lehmann was disappointed in Maxwell's comments and hopes he and Wade can work through their differences.

“It’s difficult but again we’ll work through it behind the scenes,” Lehmann said when asked of the timing of Maxwell's comments.

“They certainly can (work together) but we’ll take that offline.”