Luke had a lot of innate talent on his side and whatever skills he'd picked up. Maul had a lifetime of the knowledge that came with learning how to wield lightsabers and the innate fury that came from deep within. He and Luke kept circling around one another, fighting across the acre of land that surrounded Maul's home.

Maul kept the fight going long enough until he could see Skywalker's stamina begin to flag. This was just where Maul wanted him. Sidious had always taught him to wait for a Jedi to get tired and to the point where they might make a stupid mistake. All it took was a split second and then he could end their lives.

He saw his opportunity as soon as it presented itself. Nearby, Maul's warg Slicer was curled up like a giant fuzzy boulder, sleeping soundly despite the fight going on around him. Maul waited until they got close to his pet and then he whistled loudly. Slicer woke up with a snort and then with a loud snarl he went after Luke. As soon as Maul saw that he had an opening with the distraction, he kicked out at Luke's chest, holding back a little as he always did. His prosthetics were powerful enough that he could have crushed all the bones in someone's chest performing a move like that and he didn't need Anakin turning up on doorstep in a fury thinking he'd deliberately killed his son in what was supposed to be a friendly sparring match.