Here is a chart and argument put forth by Yolita that not only is Novak the most dominant player of the past decade but that he may already be close to achieving Greatest of All Time Status in Tennis, the GOAT. It's generally agreed though that to have that status you need to have the most number of Grand Slam wins which is currently held by Roger Federer. As has been proven multiple times before it is a record that can be surpassed since at some stage players must retire. Federer seems be winning fewer and fewer major events while Djokovic and Nadal hold astounding numbers of wins over the past decade. Looking at the stats in this time frame it is hard to argue against Yolita on this score. Here is her well organized chart.
The numbers say it all
Here is the link to the original Tweet where this chart is found. Yolita