Virtua Tennis 2009

I believe I found a bug to attain this achievement much more easily. Simply get as many mission medals as you can with one player. Then create new player and get enough mission medals with that player (or 3 or more players) that total the 30 missions combined across all players you have. Note the mission medals can be redundant for all the players you have created.

Doing this unlocked it.

The two that caused the biggest problem for me were the drop shot and the cross court shot. They are however externally simple to accomplish, others such as the lob are difficult but not because of technique like the forementioned.

The drop shot requires getting into position early and holding x as long as possible whilst pulling back on the analogue stick, once you acquire this technique they will be externally simple as you do not have to win the points just perform them.

The cross court requires you to be at the net, which will get a lot of people, but volley from one side to the other and you should easily win the point.

If however there are one or two you can not achieve then JonC guide does work as most medals etc cross over multiple playthroughs.

Good luck and if anything could be improved upon please let me know.