Rihanna's forthcoming Calvin Harris-produced single is thought to be called 'We Found Love'.

The pair have been teasing their collaboration on Twitter after rumours began circulating at the weekend that they had worked together.

On Monday (September 19), Harris re-tweeted what appears to be a song lyric that Rihanna had posted.

It read: “Sometimes it feels like we find love in the most hopeless place.”

And later, Rihanna wrote: “NP: 'WE FOUND LOVE',” which Harris re-tweeted, adding the question: “Sound good?!”

Rihanna and Harris are expected to debut the single on Friday (September 23).

The singer is currently on the South American leg of her 'Loud' tour, which arrives in the UK later this month featuring support from the DJ and producer.