That depends mate, not in the Premiership, I don't think he will ever beat Tim's 59%, but Tim was only in charge of 22 PL games so it's kippers and custard. What you can do is take the best 22 game Premier League period of the Poch's Tottenham era, from the 14th December 2014 to and say he won 13 of those - so the same number of wins as Tim, BUT the Poch only lost 3 and Tim lost 4 so by the awesome power of stats - The Poch is the best! You can do the same thing with the results for the 22 PL games from the 19th December 2015 and get the same answer, 13 wins and 4 draws - so he has been better than Tim twice!
But, in ALL games including cups the the mighty Poch WILL be in front after the Watford win, even without picking the best bits, because they're both on 50% at the moment so one more win will give him some percentage bits more - can't be arsed working it out Tim only won 1 from 6 in cup games so that was pony as fuck! Poch has won 20 from 42 cup games, 48% nice!
AVB its still the best 'all games' manager we have had on win percentage (since Frank Brettell 2 centuries back, he scored 68% wins),AVB won 55% of all his games, so there is every chance that the Poch will overtake him and become the bestest ever.
All that old gonads just proves what bollock stats are because we all know that Sir Bill (49% wins in all games) was the best ever. His cup record was magnificent, 102 wins from 165 - 62%!!! Also according to stats Santini is the best cup manager ever cos he won 2 from 2 - 100%, bollocks eh?
Bonus Question! Who is the worst manager we have ever had for all games win percentage? I will give you a clue he only scored 31% and he was a fucking star on the pitch but not so much in the gaffers seat.