anybody got a winning system for 'tennis' in the long run?

Yes, back the winning player, never fails.

also, when you say 'tennis' are you talking about tennis or something else?

I know a foolproof strategy for WTA tennis, simply see who I have backed wait until my choice is serving for the match and LAY at sub 1.05

All random systems win on BF, nobody loses.

lay low, back high

that's the only way

Good timing of the post above^ given that Sam Querrey is on 20 match winning streak (40-2 in sets!).
How much money have you printed recently, Platini?

I_Hard    Sam Querrey    Jerzy Janowicz    6-7(5) 6-2 6-4         First    1.45    -    2.73   
I_Hard    Sam Querrey    Federico Delbonis    6-2 6-3     [Stats]    Qualifying    1.28    -    3.59   
I_Hard    Sam Querrey    Axel Michon    6-4 6-3     [Stats]    q-First    1.12    -    6.16   

Hard    Sam Querrey    John Millman    6-4 6-2     [Stats]    Final    1.18    -    4.77   
Hard    Sam Querrey    Matt Reid    6-3 6-4     [Stats]    1/2    1.12    -    5.97   
Hard    Sam Querrey    James Mcgee    6-1 7-5     [Stats]    1/4    1.13    -    5.86   
Hard    Sam Querrey    Rhyne Williams    6-3 6-2     [Stats]    Second    1.19    -    4.65   
Hard    Sam Querrey    Daniel Nguyen    6-1 6-4     [Stats]    First    1.05    -    9.28   

Hard    Sam Querrey    Stefan Kozlov    6-3 6-4     [Stats]    Final    1.18    -    4.76   
Hard    Sam Querrey    John Millman    5-7 6-4 6-3     [Stats]    1/2    1.21    -    4.32   
Hard    Sam Querrey    Jared Donaldson    6-2 6-1     [Stats]    1/4    1.23    -    4.04   
Hard    Sam Querrey    Daniel Nguyen    6-3 7-6(3)     [Stats]    Second    1.09    -    7.15   
Hard    Sam Querrey    Kyle Edmund    7-6(3) 6-4     [Stats]    First    1.24    -    3.97

Hard    Sam Querrey    Tim Smyczek    6-3 6-1     [Stats]    Final    1.41    -    2.88   
Hard    Sam Querrey    Alex Bolt    6-2 6-3     [Stats]    1/2    1.11    -    6.24   
Hard    Sam Querrey    Michael Russell    3-0 ret.     [Stats]    1/4    1.25    -    3.85   
Hard    Sam Querrey    Elias Ymer    6-7(6) 7-6(5) 6-3     [Stats]    Second    1.12    -    6.05   
Hard    Sam Querrey    Frederik Nielsen    7-6(5) 6-3     [Stats]    First    1.08    -    7.6   

I_Hard    Sam Querrey    Norbert Gombos    6-4 4-6 6-4     [Stats]    Rubber 5    1.17    -    4.96   
I_Hard    Sam Querrey    Martin Klizan    7-6(6) 6-3 6-3     [Stats]    Rubber 2    1.56    -    2.4   

Dont play on tennis = Winning formula

I doubt Platini could have been talking about laying Querrey when odds on in matches below tour level surely

there is no real 'algorithm' to win

tennis is far from linear enough

but there's a very vague/general system you can approach tennis matches with, and then changing the different variables to suit the match you're betting on

variables include (arguably the most important) -->maximum amount willing to stake, entry points in the match, understanding of the volatility of the market

again, these all vary from match to match, dependent on who's playing, when and where they're playing, if they're in need of or defending points, so on and so forth. each match is unique.

for example, murray made his intentions clear 4/5 weeks ago that he intends to make London WTF, for me that was a cue for: murray is gonna play seriously in the coming weeks, therefore he's gonna be a safer bet than he usually is...as aftertiming as this looks, it's turned out that way too.

identify different situations and work according to them

hope this helps, this is how I approach tennis on here and for me it works (long term profit)

The AZ switch

when **** start going wrong he ends up with a book looking something like this

   
Robredo T.                        
   
-£9,580

Nishikori K.

£0.33p

another winner

150% profit bagged. Thanks Sam