@Iatos Ok, that next one can evolve into Umbreon if you want... I'm just going to say this, though.
I'll let you get away with evolving a Pokemon early this once, but before you evolve the other Eevees you get, you wouldn't mind waiting until other people's teams are stronger? That way, things stay balanced.
Also, bear in mind your Espeon is still low level. He probably used Confusion rather than Psychic. (That would still knock the grunt over.)