Anthony Hamilton and Ryan Day have tested positive for Covid-19 at the Betway UK Championship in Milton Keynes and have been withdrawn from the event.
Hamilton was due to play Xu Si on Monday morning and Day was due to face Jak Jones on Monday evening. Xu and Jones both receive a bye to the second round of the world ranking event.
All other players and officials tested at the event so far have had negative results.
Hamilton and Day will now undergo a period of self isolation and will receive the support of WST.
Since WST events restarted in June, strict Covid-19 regulations have been and continue to be followed, under UK Government guidance.