Slovak Peter Sagan of the Liquigas team continued to dominate the Tour of Switzerland by claiming his fourth stage win on Thursday's stage six. Sagan crossed ahead of Britain's Ben Swift of Sky with Australian Allan Davis of GreenEdge third after the 198.5km run between Wittnau and Bischofszell.

Portugal's Rui Costa of Movistar holds the overall race leader's yellow jersey with an eight-second advantage on Luxembourg's Frank Schleck.

Sagan, who won five stages at the Tour of California last month and has had a handful of top five finishes in major one-day classics this season, now has six stage wins from the race in two years.

RESULTS: A 198.5km ride from Wittnau to Bischofszell:
   Stage
   1. Peter Sagan (SVK/LIQ) 4hr 30min 08sec (average: 44.1 km/h), 2. Ben Swift (ENG/SKY) same time, 3. Allan Davis (AUS/GEC) s.t., 4. Michael Albasini (SUI/GEC) s.t., 5. Oscar Freire (ESP/KAT) s.t., 6. Lloyd Mondory (FRA/ALM) s.t., 7. Marco Marcato (ITA/VAC) s.t., 8. Alessandro Bazzana (ITA/TT1) s.t., 9. Matti Breschel (DEN/RAB) s.t., 10. Francesco Gavazzi (ITA/AST) s.t., 11. Zdenek Stybar (CZE/OPQ) at 3sec, 12. Greg Van Avermaet (BEL/BMC) s.t., 13. Steven Kruijswijk (NED/RAB) s.t.,  14. Jakob Diemer Fuglsang (DEN/RSH) s.t., 15. Wout Poels (NED/VAC) s.t., 16. Mathias Frank (SUI/BMC) s.t., 17. Frank Schleck (LUX/RSH) s.t., 18. Rui Costa (POR/MOV) s.t., 19. Robert Gesink (NED/RAB) s.t., 20. Alex Howes (USA/GRM) s.t.
   Selected: 32. Damiano Cunego (ITA/LAM) 0:03, 45. Alessandro Petacchi (ITA/LAM) 0:03, 53. Levi Leipheimer (USA/OPQ) 0:03, 68. Tom Boonen (BEL/OPQ) 0:15, 91. Baden Cooke (AUS/GEC) 1:32, 99. Fabian Cancellara (SUI/RSH) 4:52, 100. Stuart O'Grady (AUS/GEC) 4:52, 102. Tyler Farrar (USA/GRM) 4:52
   
   Overall
   1. Rui Costa (POR/MOV) 25hr 23min 38sec, Frank Schleck (LUX/RSH) at 0:08, 3. Roman Kreuziger (CZE/AST) 0:15, 4. Thibaut Pinot (FRA/FDJ) 0:19, 5. Nicolas Roche (IRL/ALM) 0:21, 6. Thomas Lövkvist (SWE/SKY) 0:21, 7. Alejandro Valverde (ESP/MOV) 0:23, 8. John Gadret (FRA/ALM) 0:24, 9. Mikel Nieve (ESP/EUS) 0:26, 10. Tom Danielson (USA/GRM) 0:29, 11. Robert Kiserlovski (CRO/AST) 0:32, 12. Jakob Fuglsang (DEN/RSH) 0:33, 13. Levi Leipheimer (USA/OPQ) 0:37, 14. Chris Anker Sorensen (DEN/SAX) 0:40,  15. Giampaolo Caruso (ITA/KAT) 0:41, 16. Steven Kruijswijk (NED/RAB) 0:47, 17. Damiano Cunego (ITA/LAM) 0:57, 18.
Vladimir Gusev (RUS/KAT) 0:58, 19. Robert Gesink (NED/RAB) 1:09, 20. Moreno Moser (ITA/LIQ) 1:13
   Selected: 54. Oscar Freire (ESP/KAT) 9:39, 62. Peter Sagan (SVK/LIQ) 12:16, 71. Ben Swift (ENG/SKY) 13:47, 85. Mathew Hayman (AUS/SKY) 19:21, 86. Allan Davis (AUS/GEC) 19:55, 91. Alessandro Petacchi (ITA/LAM) 21:22, 95. Baden Cooke (AUS/GEC) 22:35, 108. Tom Boonen (BEL/OPQ) 27:32, 122. Stuart O'Grady (AUS/GEC) 34:28, 123. Tyler Farrar (USA/GRM) 34:31