Greta Thunberg is among a number of climate activists that have condemned Roger Federer’s ties to Credit Suisse bank, a major sponsor of fossil fuel companies globally.

Environmentalists have criticised the banks decision to continue loaning billions to the fossil fuel industry despite the alleged damage to the climate their activities are causing. It was a re-tweet by Thunberg of this message that has turned up the heat on the tennis star:

Federer, who is an ambassador for the Swiss bank, has issued a carefully worded reply to the Swedish eco-warrior from his current base in Australia, promising to “dialogue” with Credit Suisse:

“I take the impacts and threat of climate change very seriously, particularly as my family and I arrive in Australia amidst devastation from the bushfires,” Federer said.

“As the father of four young children and a fervent supporter of universal education, I have a great deal of respect and admiration for the youth climate movement, and I am grateful to young climate activists for pushing us all to examine our behaviours and act on innovative solutions. We owe it to them and ourselves to listen. I appreciate reminders of my responsibility as a private individual, as an athlete and as an entrepreneur, and I’m committed to using this privileged position to dialogue on important issues with my sponsors.”

The tennis champion is in Australia with his family to raise funds for those affected by the bushfires engulfing large parts of the country.

Meanwhile, twelve people who played tennis in a branch of Credit Suisse to draw attention to the links Federer has to the bank are set to appear before a Swiss court after refusing to pay the fine imposed on them for the publicity stunt.