English singer Ellie Goulding expressed eternal gratitude for being chosen to perform at Roger Federer’s retirement ceremony on Friday at the Laver Cup.

The Grammy-nominated singer made a surprise appearance during the farewell to sing some of her notable hits such as Burn and Still falling for you. During her performance, Federer and Rafael Nadal were seen tearing up.

“Ellie Goulding, your performance last night made the evening absolutely perfect. Can’t thank you enough for being there,” Roger Federer tweeted.