England will have to make “a very late call” on their playing XI for the first Test against South Africa, starting at Centurion on Thursday, captain Joe Root said on Tuesday.

With all-rounder Ben Stokes at the bedside of his critically ill father and Chris Woakes the latest victim of illness that has swept through the touring squad, Root admitted that the build-up to the four-match World Test Championship series had been “frustrating”.

Fellow all-rounder Woakes did not train on Tuesday because of illness, but Root said the recovering Stuart Broad, Jofra Archer and Jack Leach were making good progress. “We will have to keep them monitored over the next couple of days and see how things go.”

“It puts things in perspective,” he said. “We need to play good hard cricket and win this series but most important for us as a squad is we need to make sure that Ben and his family get all the support they need.”

The England captain added: “It’s been quite frustrating in many ways but we have to handle it and get on with it and make sure the guys who are selected are ready to go.

“We’ve got some very competitive players who are desperate to prove themselves. If they get an opportunity they will want to come out and put in a performance for England. We’re going to have to make a very late call on our team.”