How do you improve speed

Maybe speed isn't the key to beat that particular opponent

Thanks Alois

By the way Johan B I have tried beating him with spin but due to the fact that he is fairly good at both speed and spin, well it isn't too effective. 

I had better results when I played him with speed. 11-8 with speed my loss. 11-5 with spin my loss.

Spin and speed are important, but they cannot be the only focus of your play, do you have a strategy, do you know where the persons weaknesses and strong points are?  If you do, are you playing to them?  Are you placing your shots well?  Honestly, I would love to play against spin and speed than a well placed shot.  By moving your focus out of the realms of spin and speed, you can find other tactics, set ups, and placement to play against your opponent.  Is he tall?  Tall people generally can hit the corners well due to there wide wingspan, but falter in the middle due.  Is your opponent short? Then he can easily cover his middle, but he will struggle to hit the corners.  As your level raises, it's the variation of your spin, speed, placement, and tactics that matter, it's not just an emphasis on one, you need all three to succeed.

Be creative and think!  You've played him before, use your previous knowledge to derive plans, and just keep on trying!

Being creative and strategic is important, but not getting used to how the opponents play might be a little bit tough, its just like Jan Ove Waldner against Ryu Seung Min in the 2004 olympic

thx everyone