How Federer, Murray, Nishikori can qualify for the WTF semis?

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Roger Federer and Andy Murray were the hot favorite to get to the final 4 in London in the Group B. Roger lived up to the expectations winning the first two matches in straight sets while Andy stumbled on the first hurdle against Nishikori to then beat Raonic in straight sets. Let’s see the chances they have to qualify.

First of al,l these are the last 2 matches of the group

Federer- Murray
Raonic – Nishikori

FEDERER -> almost done

Roger is practically sure to get to the semis. 
The Maestro will qualify if he defeats Murray or he loses to the Scott in 3 sets.  
Roger will also make it if he loses in straight sets to Andy unless his defeat is something spectacular and Nishikori demolishes Raonic in 2 easy sets. In this case they should see at the Game Ratio (difference between games won and lost)

MURRAY -> still decent hopes

Andy will qualify only if he beats Roger (unless he loses in 3 and Raonic wins in 2).
If Andy wins in straight sets he will definitely qualify unless Nishikori wins in 2 (in this case we will look at the Game Ratio).
If Andy wins in 3 in this case he qualifies only if Raonic defeats Nishikori.

NISHIKORI -> better chances than Murray

Kei will get to the semis if he beats Raonic in 2 unless Murray has an amazing win against Roger (in this case we would get to the game ratio scenario).
The Japanese will also make it if he wins in 3 sets unless Murray wins in 2.
Kei will qualify if he loses to Nishikori in 3 sets, but Roger defeats Murray.
It’s game over for Kei if he loses in straight sets to Raonic

RAONIC -> bye bye

No luck for Milos that will make it only if he has a spectacular win against Nishikori and Roger trashes Murray.

 

This is a good overview