Chelsea returned to winning ways on the road, while Leicester City's fine season continued on a Saturday we review with Opta data.
Marcelo Bielsa's Leeds United became only the second top-flight team to lose by three goals in the FA Cup to a side in the fourth tier.
Amid Chelsea's form slump, Frank Lampard's position at the helm is reportedly under threat.
Arsenal and Tottenham picked up impressive wins while Sheffield United lost again in Saturday's Premier League action.
Tottenham were at their predatory best against Leeds United, who were architects of their own downfall in a 3-0 defeat.
Tottenham's title challenge is being powered by "special things" from Son Heung-min and Harry Kane, according to Jose Mourinho.
There was a landmark moment for Son Heung-min in Tottenham's 3-0 Premier League win over Leeds United.
Pep Guardiola and Mauricio Pochettino are supposedly "disciples" of Marcelo Bielsa, but it is not a term Spurs' Jose Mourinho is fond of.
Jose Mourinho said it would be a "big surprise" if Tottenham were to make any moves in the January transfer window.
It's a new year, so we have identified 21 under-21 players to watch in 2021, with a little help from Opta data.