Cruz Hewitt shows off impressive tennis skills

Lleyton Hewitt's nine-year-old son Cruz looks to be following in his father's footsteps and eyeing a tennis career of his own.

Lleyton and Cruz were at the Sydney International on Saturday night to watch young Aussie Alex De Minaur in the men's final.

INCREDIBLE EFFORT: De Minaur falls agonisingly short of maiden title

Hewitt has been working as a mentor for De Minaur and has been seen sitting in his box all week.

On Saturday night as Hewitt was waiting to have a warm-up hit with De Minaur, Channel 7 cameras spotted him putting Cruz through his paces.

Cruz in action. Image: Channel 7

And the little nine-year-old has some serious skills.

Cruz could be seen hitting some very impressive forehands and backhands, as well as volleying and smashing.

Serious skills. Image: Channel 7

In 2016, Hewitt said his son could be good enough to make his Australian Open debut at age 14, one year younger than he was.

"Hopefully he beats me," Hewitt said after playing his last Australian Open singles match.

"Hopefully he gets a chance to play in this great event if he wants to."

It's not the first time we've seen Cruz in action, who regularly shows his dad how it's done around Australian Open time.