Seven new dates have been added to the upcoming tour, including a third show in Ireland
The dates include their first-ever shows in Greece, Romania and Finland
The cover may have been a tribute to Swedish pop masterminds Max Martin and the late Denniz Pop
"We love you so much, happy retirement, and we’re going to miss you so much," frontman Chris Martin told the music icon through a live video message from his own Sweden show
Chris Martin joked that the tennis icon used to be the band's "fifth member"
Tickets to the new show go on sale on June 20
They have also announced concerts in the Philippines and Thailand
They performed ‘Dakota’ together, and a choir also joined the band for a rendition of ‘Hen Wlad Fy Nhadau’
The band describe the new figures as a "good start" but say more work is to be done
The band also performed a cover of James’ classic ‘Sit Down’