Who knows how many matches Pochettino needs to increase his players' confidence to be able to win matches, but they have failed in 5 of the first 6 matches this season. I won't completely say Pochettino will fail this season with Chelsea, but I can really predict that his work for Chelsea this season will be very tough.
He's already failed to create a new Chelsea, there's no need to wait anymore as the result will be pretty much similar like the present.
Chelsea will not able to reach top 7 positions, but they're not really as bad as weak teams in relegation zone, at least Chelsea is safe and not relegated to Championship league.
Chelsea must sack Pochettino ASAP before they suffer larger loses.