On Wednesday afternoon, just hours before Sundowns league encounter against Stellenbosch at Athlone Stadium, Amakhosi confirmed 'Mido' agreed to join the Brazilians ahead of the 2020/21 season.
However, after securing a hard-fought 1-0 win over the Cape Town-based outfit, that takes them four points behind the Soweto giants with a game in hand, Mosimane neither confirmed nor denied the statement from the league leaders.
"No, I don't want to talk about George Maluleka, Sundowns must speak about George Maluleka," he said.
"I'm not Sundowns, I'm the coach, if I'm Sundowns, then I do everything, so let Sundowns announce George Maluleka.
"Until Sundowns announce George Maluleka, then it can be official - at the moment it's a rumour.
"Do I want to be a spokesperson for Kaizer Chiefs guys, I wish I could tell you, I need to wait for my team, with all due respect, I think you understand."
Mosimane's side face Orlando Pirates in their next league game which could take them one point off Chiefs in the title race.