Tsipras spoke to Putin. They discussed bilateral cooperation, Putin expressed sympathy for the Greek people.
If grexit does happen, then Russia will have the perfect opportunity to capitalize on it.
No one in the west wants Greece to fall under Russia's influence, and this meeting might partially be a ploy by Tsipras to show the immediate danger of this happening if Greece is ejected from the Euro.
Why not? It would have an extra benefit of hastening the Russian collapse.
?
It will severely deplete Russian reserves.
Russia doesn't need to bail Greece out. The collapse of the Greek economy (well, what's left of it) and ejection from the EU would be the perfect environment for Russia to gain influence in.
Russia can't bail Greece out, it doesn't have the resources and their economy is pretty ed as well. I saw a graph a while back projecting that the size of the Greek economy in 10 years time with Grexit\staying will not be all that different. I think it's best for everybody at this point if Grexit happens already instead of this perpetual instability, it will mean chaos on the long run but probably better on the long run.