From Manchester United down, no one has won more than half of their last 6 games until you get to Brighton in 9th. They've won 5 out of 6, and are only two points behind Chelsea.
That's not to say Chelsea/Liverpool CAN'T go on a short run like they did 8 or 9 games back, and string 3 or 4 wins together. It's entirely possible, just increasingly unlikely. The problem is, we're into the '6 cup finals' stage of the season, so form isn't actually that important. Back-to-back wins can make a MASSIVE difference to anyone in the CL hunt (or indeed those who don't match those results).
I like that it's in our own hands, and I wouldn't want to be in Chelsea's position, but the sooner we make it mathematically safe, the better. We really don't want to be looking at Liverpool and Man City in the last two games knowing we definitely need results.