The best scenario for us is Shakhtar not to lose in London. If they do lose then we must beat Chelsea, but if Shakhtar play a draw or even better, win, then beating Chelsea won't be a must since we will have a 2nd chance in Doniezk against an already qualified and group winning Shakhtar.
Technically, not winning yesterday was a step back, but it doesn't change things much. Our match vs Chelsea was still gonna be decisive.
Of course, no need to highlight the importance of next round's match. We could allow a draw yesterday, but we can't allow it in two weeks.