The centre-backs each found the net in the 2-1 home win over West Ham United, earning two bonus points apiece on Saturday afternoon.
Dias and Stones's strong starts to Double Gameweek 26 mirrored their displays in Man City’s Double Gameweek 19, when they produced 27 and 18 points respectively.
GW26 goals for Dias and Stones
And their prospects for more big hauls look encouraging.
Not only do Man City still have a home encounter with Wolverhampton Wanderers in the second match of Gameweek 26, they also play twice in Gameweek 27.
More joy at the back
Newcastle United defender Jamaal Lascelles (£4.2m) also produced 10 points on Saturday, his highest haul of the season.
But it is Kyle Bartley (£4.4m) who is currently the top-scoring player in the Gameweek.
West Brom No 1 Sam Johnstone (£4.5m) collected 10 points as Sam Allardyce’s side recorded their second successive shutout ahead of their midweek home match with Everton.
Martinez and El Ghazi star for Villa
Elsewhere at the back, Emiliano Martinez (£5.3m) extended his lead at the top of the goalkeeper standings in Fantasy.
Highlights as Villa beat Leeds
Martinez's team-mate Anwar El Ghazi (£5.3m) was among only three midfielders or forwards in Fantasy to score on Saturday.
The winger’s decisive goal at Elland Road earned him 11 points ahead of Villa’s visit to Sheffield United on Wednesday night.
Ruben Neves (£5.1m) extended his fine form by scoring Wolves’ equaliser at Newcastle.
All five of his goals this season, and his single assist, have come in his last nine appearances.
Meanwhile, West Ham frontman Michail Antonio (£6.5m) punished his huge numbers of sellers by scoring West Ham’s consolation at the Etihad Stadium.
He was the sixth-most sold player in the Gameweek, moved on by 311,000 managers.
Antonio has scored four goals and supplied three assists in eight appearances since returning to the Hammers’ starting line-up in Gameweek 19.
Also in this series
Part 1: GW26 FPL stats: Fernandes owners frustrated by Double blank
Part 2: GW26 Bonus points: Mount counts more gains
Part 4: FPL Sunday review: Bale back to his best?
Part 5: Who are the best replacements for Barnes in FPL?
Part 6: FPL Monday review: Richarlison extends goal run
Part 7: FPL Tuesday review: Jesus and Mahrez are Double differentials
Part 8: FPL Wednesday review: Fernandes foiled by Palace defence