Super League: Castleford Tigers vs Huddersfield Giants off after positive coronavirus tests Castleford Tigers returned 12 positive Covid-19 tests; Huddersfield Giants will now face Warrington Wolves, who had been due to play Salford Red Devils, as part of Friday's double-header at Totally Wicked Stadium instead The Tigers reported 12 positives had been returned from the latest round of testing on Tuesday, leading to the non-televised game at the John Smith's Stadium being cancelled. Huddersfield will now face Warrington Wolves on Friday evening in a match which has been brought forward from Round 21, kicking off at 5.30pm as part of the double-header at Totally Wicked Stadium. There is a knock-on effort for Leeds Rhinos, who beat Castleford on Monday and face Wakefield Trinity in one of Thursday's live Super League matches on Sky Sports, as well. The Rhinos have not returned any positive tests, but four of their players have been required to self-isolate as a result of track and trace analysis. "We have had a number of players stood down on track and trace and that will rub them out of a very important run-in for us," Leeds head coach Richard Agar said. The match between Warrington Wolves and Salford Red Devils has also been cancelled Warrington became available to play Huddersfield as their scheduled match against Salford Red Devils was also cancelled after the Red Devils informed Super League and the RFL that they only had 13 players available for selection. This includes two recent loan signings and two players promoted from the academy, who were brought into the squad in order to assist in the fulfilment of fixtures. Under competition rules governing forfeited fixtures, the Wolves will be awarded a 24-0 victory. The matter will be referred to the RFL's Compliance Department for further consideration. Six matches from Rounds 18 and 19 of the Super League season will be shown live on Sky Sports following confirmation of the latest fixtures. With Round 18 kicking off just two days after the conclusion of Round 17, it takes the total of matches Sky Sports will be broadcasting over this period to 10 in the space of nine days. There will also be a long-awaited return to their Mobile Rocket Stadium home for Wakefield Trinity - albeit behind closed doors - in two upcoming non-televised matches, which will be available to season-ticket holders on the Our League app during those two rounds. Trinity kick off Round 18 with the visit of Hull Kingston Rovers on the afternoon of Sunday, October 25, with Warrington Wolves travelling to France to face Catalans Dragons the following day. Monday, October 25 sees a live double-header on Sky Sports as well, with Salford Red Devils facing St Helens in a rematch of last year's Grand Final followed by a Yorkshire derby between Leeds Rhinos and Castleford. The action moves to the Totally Wicked Stadium for another live double-header three days later as Leeds tackle Wakefield and cross-city rivals Hull KR and Hull FC face off once more.