For the latter his goal was just reward for what was an exceptional performance from the Brazilian. Since his £30 million arrival from Anzhi Makhachkala the winger has split opinion with his performances at Stamford Bridge.
Willian is what you would call a Mourinho player. Unlike his Brazilian stereotype might suggest Willian is in fact a tireless worker on the field of play, restless for 90 minutes, tracking back and never neglectful of his defensive duties.
In the past Eden Hazard and Andre Schurrle have been criticised for this aspect of their game by Mourinho and Juan Mata's inability to become more of a functional player saw him become dispensable - Willian gives Mourinho everything he asks for.
But too often Chelsea fans have been left frustrated with how this aspect of Willian's game distracts him from his other duties going forward.
There was certainly no hint of that at the Bridge yesterday.
Along with his goal, which admittedly was a tap-in, he also found an assist and was involved in the second goal as well.
Chelsea often rely on Eden Hazard for such performances, but on a day when he was off the boil Willian really stepped up to the plate - pleasing Chelsea fans in his wake.
Here is some of the reaction from Twitter to Willian's performance against Aston Villa...
Willian looks a lot better going forward this season; work ethic never in question but didn't turn on the attacking quality much last season— Zandie Thornton (@EarthToZandie) September 28, 2014
WILLIAN! W is for world-class— Zoha (@hazardass) September 27, 2014
Great performance from Willian yesterday one of his best performances in a Chelsea shirt— benny boy (@ben4589) September 28, 2014
Willian had an amazing game vs villa today compared to how bad he was last week— Connor (@ConnorMasonB) September 27, 2014
Willian was amazing today.— H (@Hassan241) September 27, 2014
Thought Willian was superb yesterday for #CFC. Never been his biggest fan & wondered why he was preferred to Mata. Skill & work ethic v.good— Stuart Clough (@stuclough85) September 28, 2014
Great game today! Love how Eden can not play well yet others can step up, Willian and Oscar were superb today! pic.twitter.com/SkC1Xh0mtA— Gary Cahill UK (@GaryCahillUK) September 27, 2014
Willian was definitely my man of the match today, played superb— Luke 'Ruse' Walker (@lukeyboi7) September 27, 2014
Willian my man of the match, barring an own-goal hat trick in the next 3mins. Scored one, made one, involved in other, Worked tirelessly.— Dan Levene (@BluesChronicle) September 27, 2014
My man of the match would probably be Willian. Despite some clumsy attempts, been working hard switching sides throughout the game. Class.— Nur Arif Safwan (@FueledByArif) September 27, 2014
Willian man of the match so far...I said 100 times never under estimate him xD HT 1-0— Binu Zachariah (@Zacbinu) September 27, 2014