Proud Kolo says Blues fans will see much more of Yaya's talents in the coming months, as the £24m buy from Barcelona gradually settles into English football.
His goal at DW Stadium will help with that process, and Kolo feels that, despite his powerhouse 6ft 3ins frame, his brother is finding it as difficult as David Silva to adjust to the pave and physicality over here.
"Of course it's good that he's off the mark," said Kolo, who continued his own impressive start to the season with another accomplished defensive performance at Wigan.
"That goal just finished the game off nicely because we knew 1-0 might not be enough. In the Premier League, there are a lot of late goals but Yaya's goal made it more comfortable.
"There is still a lot more to come from him, it takes time to adapt to the Premier League. It's really different from La Liga. At the moment, he is doing his best but I'm sure he can do a lot better.
"Does he come to me for advice? Not at all. He won the Champions League, he's played for the best team in the world, Barcelona. If anything I'm learning from him."