Waratahs name unchanged side NSW coach Michael Cheika has named an unchanged starting line-up for Sunday's Super Rugby clash with Western Force, but has beefed up his bench with the return of Test hooker Tatafu Polota-Nau. The Wallabies rake has missed the Waratahs' past two matches with a hamstring injury he suffered against the Brumbies. Cheika opted to retain the same side that started last Sunday's home win over the Blues and again named five forwards on the bench, with Polota-Nau replacing Luke Holmes. The Waratahs have won two of their five games, and are four points ahead of the Force, who have won one of four. Force coach Michael Foley, who held down the same position with NSW last year, will be up against the Tahs for the first time since moving west. He has yet to announce their team for the Allianz Stadium encounter, but will have to make at least one enforced change following a season-ending knee injury to hooker Nathan Charles. Former Waratahs utility back Sam Norton-Knight is tipped to make his Force debut. NSW Waratahs team: Israel Folau, Peter Betham, Adam Ashley-Cooper, Rob Horne, Drew Mitchell, Bernard Foley, Brendan McKibbin, Pat McCutcheon, Michael Hooper, Dave Dennis (capt), Kane Douglas, Sitaleki Timani, Paddy Ryan, John Ulugia, Benn Robinson. Reserves: Tatafu Polota-Nau, Sekope Kepu, Mitchell Chapman, Jed Holloway, Matt Lucas, Ben Volavola, Tom Kingston.