British No.1 Johanna Konta was ruled out of Wimbledon on the eve of the tournament after a member of her team tested positive for Covid-19.

Organisers announced late last night that the 30-year-old from Eastbourne, who was seeded 27, had been classified as a close contact of a positive case.

A member of Konta's three-strong team of fiance Jackson Wade, coach Dan Smethurst and fitness coach Gill Myburgh showed Covid symptoms yesterday morning and a subsequent PCR test returned a positive result.

Konta, who faces dropping well outside the top 30, will now be required to spend ten days in self-isolation and will be replaced in the singles draw by lucky loser Wang Yafan of China.

A statement from the All England Club read: "A member of Johanna Konta's team presented with Covid-19 symptoms this morning and immediately isolated and undertook a PCR test in accordance with the Championships' testing protocols.

"A positive result was returned which resulted in the AELTC, together with Public Health England, identifying Johanna Konta to be a close contact.

"In line with Government legislation, she is required to self-isolate for 10 days and therefore is withdrawn from the Championships.

"Both Johanna and her team member had tested negative on all their previous tests undertaken within the Championships' protocols. Both individuals were advised of the positive test and close contact classification and are now self-isolating for the next 10 days."

It is dreadfully bad luck for Konta, who reached the quarter-finals at SW19 two years ago and the semi-finals two years previously and had played herself into form on the grass by winning her first title for four years in Nottingham two weeks ago.

She subsequently withdrew from tournaments in Birmingham and Eastbo