Chief executive Sally Bolton is confident the tournament will get back on track and finish by Sunday evening.

"We now have an extra day, we've got the two roofs, so, in terms of resilience to get through the Championships, we're confident we can still do that despite the continuing variability of the weather," said Bolton.

Wimbledon will hope to complete the entirety of the tournament on grass - but there is a plan they could reluctantly activate if that becomes impractical.

The All England Club has a large indoor tennis centre across the road from the main site which it could use, although the courts are hard rather than grass.

"We've got a range of contingencies. Going indoors is one of those options but that really would be a bit of a last resort," Bolton said.

Wimbledon changed from a 13-day to a 14-day tournament two years ago with the addition of play on its middle Sunday, when previously play only took place in the event of a desperate backlog.

Organisers have already made a change to the mixed doubles format in an effort to shorten matches - going from the best of three full sets to having matches decided on a 10-point tie-break if teams are level after two sets.