Former prime minister Dr Mahathir Mohamad said he is willing to meet up with Opposition leader Dr Wan Azizah Wan Ismail, but only to discuss about toppling Prime Minister Najib Abdul Razak.

"I haven't (met with Wan Azizah). If she wants, yes, I am open to it. For only one purpose - to topple Najib.

"Today, our struggle is limited to one thing only - to bring down Najib...