Top Spin 4

The most efficient way to get this achievement is to gradually attain Special Objectives from the Sparring Partner Trainings as you work your way through career mode. The Special Objectives are usually fairly easy so you shouldn’t have any problems (win a game without losing any points, score 3 winners in a game, don’t make any errors e.t.c)

However if you want to get this quickly the best way is to go onto the Xbox Live menu, then World Tour and proceed to play with one of your created players. Then simply go down to Sparring Partner Training and rinse and repeat until you get the achievement. It is sometimes better to do it this way as it doesn't interfere with your career mode (if you don’t want to be skipping months and special events to do this).

Additionally I found that it is more efficient to lose either the first or the third game so that you get four games in total as a special objective appears every 2 games, so it isn't ideal to defeat your opponent in 3 games if you wish to maximise your time. It also helps, if you're as lazy as I am, to set them to very easy!

Edit: Just to add, incase I didn't make it clear, that Career Mode and World Tour Special Objectives do stack.