Highlights, analysis and features from round 21 of the Super League.Warrington face Salford. The teams produced the most thrilling match of the season when they met in March, with the Wolves winning by a single point. Chris Sandow's remarkable long-range drop goal on the final hooter claimed the victory for Warrington, and with both teams desperate for points at opposite ends of the table, it could be another dramatic night. Wakefield are looking to complete a double over Wigan, having sensationally won their first meeting this season by 62 points to nil. The Wildcats are looking to avoid the bottom four this year, but Wigan will be out to avenge what was their biggest Super League defeat for over a decade. Hull FC are at home to Leeds. The Rhinos victory over the Black and Whites at Headingley this season was a rare defeat for Hull FC, who have been leading the way in the Super League table for the last six weeks. St Helens take on Widnes, Castleford host Catalans and two of the bottom four go head to head as Hull KR play Huddersfield.