The easiest way to do this:
Substitute your forwards for defenders (your defenders will now be your main attackers). Keep scoring goals with the same defender in the game and he should get the Man of the Match award. Do this 49 more times.
Note: Scoring will now be more difficult as defenders that are rated 85 and above for their position will usually be rated in the 60-69 range as a forward. Try only shooting high percentage shots, because if you don't, the opposing goalie will tend to be the Man of the Match due to the high number of saves.
This is the most difficult of the Man of the Match achievements.