Chelsea reeled off 13 successive wins after the change and, despite a brief wobble with defeats against Crystal Palace and Manchester United, they coasted to the title in a no-nonsense style befitting their intense boss.
He was then dragged out of his post-match media conference by celebrating players David Luiz and Diego Costa, but not before pinpointing the key moment in his side's season.
"Guys, champions! Enough, enough!"
Asked whether he could 100 per cent guarantee he will be Chelsea manager next season, Conte replied: "Yeah, yeah".
His only starts subsequently came in the EFL Cup loss at West Ham in October and the FA Cup early rounds with Peterborough - in which he was sent off for Chelsea's only red card this season - Brentford and Wolves.
It's all down to Conte.
The Blues secured the Premier League title with a 1-0 win over West Bromwich Albion on Friday night, ending Tottenham Hotspur's slim chances of pipping their rivals to the trophy.
Antonio Conte has intimated his desire to stay at Chelsea, who the Italian believes can get even better after their Premier League title triumph.
Back in the dressing room, Conte walked through the door after some TV interviews and was soaked by a huge bucket of water.
That prompted Conte to switch to his preferred system of 3-4-3 - or 3-4-2-1 if you prefer, with Costa as the target man supported by Hazard and, in the main, Pedro rather than Willian.
On the decision to bring on Batshuayi for Eden Hazard, boss Antonio Conte said: "I think Hazard and Pedro were a bit exhausted".
The Italian, victor of three Serie A titles as Juventus manager, has transformed Chelsea from flops to champions in one season with largely the same group of players. Finally, there were those who said the Stamford Bridge club benefited from not having to play in Europe this season.
Shortly after Michy Batshuayi scored the all-important goal eight minutes from time to crown Antonio Conte's team champions, pockets of disturbance erupted in the Birmingham Road End and the East Stand.
Conte has enjoyed a staggeringly successful career. "They show me a great attitude to try to do something great this season".
West Brom manager Tony Pulis was full of praise for Conte - both for his infectious touchline enthusiasm and his ability to alter the tactics when his approach was going wrong.
Chelsea have now won five Premier League titles since Russian billionaire Roman Abramovich bought the club in 2003, but this one is arguably the most impressive considering they finished a woeful 10th last season. "We had to solve a lot of problems", he said. "I want to say thanks to my players, my staff, the club, who always support me". After this win we must be happy, we must be pleased.
Chelsea, who started Friday's contest with 84 points from 35 matches, needed to win just one of their final three games to assure themselves of their fifth league title.
"When I chose to return [to Chelsea], many people did not understand it".