In the red corner is the Troika. In the blue corner is the Greek parliament. In the middle is Tsipras
Starting with the usual big IF, if a deal is done on Greece the first thing that needs to happen is that it will be sent off to be voted on by member states. I touched on this yesterday with the story that the German's will have the fast lane open to their parliament when the time comes to vote on the deal
That should happen pretty easily for all the other states but it's in the Greek backyard that the problems may arise.
As Langers note's in the comments also, Tsipras getting the Greek parliament to vote through the deal and concessions may not be such and easy ride.
Reuters IFR already notes that the current concessions are facing a backlash in Greece with parliaments deputy speaker warning that the current proposals would struggle to win approval
"I believe that this programme as we see it ... is difficult to pass by us," deputy parliament speaker and Syriza lawmaker Alexis Mitropoulos said on Greek TV
Should Tsipras fail to get approval for any deal then it raises the spectre of snap elections and a referendum, which will make things even worse for Greece who will run out of time to at least pay the IMF
Greek parliament is as mad as a box of frogs at the best of times so waiting for a deal to pass through it will be hair raising enough, especially given how many parties there are
It's yet more added risk that the euro may also be thinking about and it will do us well to remember this risk after the initial market reaction on any deal that's announced
In football, winning away is often a bonus but winning at home is a must