Nico Rosberg had a steady start to his Formula One World Championship challenge in Austin, Texas on Friday of the US Grand Prix weekend, finding himself comfortably outpaced by teammate and championship rival Lewis Hamilton before turning the tables to lead the field heading into day two. Opening practice in America marked more track action for Alfonso Celis (in for Sergio Perez at Force India) and Jordan King, son of former Sainsbury's CEO Justin King, making his race weekend debut at the reigns of the Manor Racing car vacated by Mercedes young driver (and potential Nico Hulkenberg replacement?) Pascal Wehrlein. With Hamilton currently looking to make up a 33 point deficit in the fight for the 2016 Drivers World Championship, it was first blood to the British driver as he took the opportunity to post the fastest time during a trouble free opening session, stopping the clocks over three tenths up on the sister Mercedes and almost two whole seconds quicker than next nearest challenger Max Verstappen in the Renau.... TAG powered Red Bull. Practice two saw a return to form for Rosberg, as he bettered his British teammates time from the morning by a tenth of a second, ending the day fastest ahead of Daniel Ricciardo, Sebastien Vettel and Lewis Hamilton, down in third. Hamilton showed strong pace during his longer super-soft and soft/mediums runs, with the Red Bull partnership of Ricciardo and Verstappen again looking ominous during race simulation runs. Many drivers found reason to complain about performance of the super soft tyres after only a limited number of laps. Incidents and off track excursions from many drivers left a somewhat ragged session, with bad luck once again visiting Romain Grosjean as the Haas driver again found parts of his car liberating itself while the Frenchman circulated on track. Sebastian Vettel was lucky to escape an incident as the piece of rear wing from Grosjean's Haas fell close to the following Ferrari driver, surely a cause for concern for Grosjean heading into a Grand Prix on the fast, flowing Circuit of the Americas track. Practice resumes on Saturday as the drivers head into the final session before qualifying commences for round 18 of the FIA Formula One World Championship at the United States Grand Prix in Austin, Texas. Friday Free Practice 1 Results 1. Lewis Hamilton GBR Mercedes-Mercedes 1m 37.428s 2. Nico Rosberg GER Mercedes-Mercedes 1m 37.743s 3. Max Verstappen NED Red Bull-TAG 1m 39.379s 4. Kimi Raikkonen FIN Ferrari-Ferrari 1m 39.407s 5. Nico Hulkenberg GER Force India-Mercedes 1m 39.712s 6. Valtteri Bottas FIN Williams-Mercedes 1m 39.776s 7. Daniel Ricciardo AUS Red Bull-TAG 1m 39.963s 8. Sebastian Vettel GER Ferrari-Ferrari 1m 39.988s 9. Daniil Kvyat RUS Toro Rosso-Ferrari 1m 40.131s 10. Carlos Sainz Jr ESP Toro Rosso-Ferrari 1m 40.140s 11. Felipe Massa BRZ Williams-Mercedes 1m 40.191s 12. Felipe Nasr BRA Sauber-Ferrari 1m 40.287s 13. Fernando Alonso ESP McLaren-Honda 1m 40.362s 14. Romain Grosjean FRA Haas-Ferrari 1m 40.826s 15. Esteban Gutierrez MEX Haas-Ferrari 1m 40.970s 16. Marcus Ericsson SWE Sauber-Ferrari 1m 41.170s 17. Alfonso Celis MEX Force India-Mercedes 1m 41.422s 18. Jenson Button GBR McLaren-Honda 1m 41.663s 19. Kevin Magnussen DEN Renault-Renault 1m 41.942s 20. Jordan King GBR Manor-Mercedes 1m 42.021s 21. Jolyon Palmer GBR Renault-Renault 1m 42.332s 22. Esteban Ocon FRA Manor-Mercedes 1m 43.874s Friday Free Practice 2 Results 1. Nico Rosberg GER Mercedes-Mercedes 1m 37.358s 2. Daniel Ricciardo AUS Red Bull-TAG 1m 37.552s 3. Lewis Hamilton GBR Mercedes-Mercedes 1m 37.649s 4. Sebastian Vettel GER Ferrari-Ferrari 1m 38.178s 5. Max Verstappen NED Red Bull-TAG 1m 38.258s 6. Nico Hulkenberg GER Force India-Mercedes 1m 38.508s 7. Sergio Perez MEX Force India-Mercedes 1m 38.568s 8. Jenson Button GBR McLaren-Honda 1m 38.713s 9. Fernando Alonso ESP McLaren-Honda 1m 38.801s 10. Kimi Raikkonen FIN Ferrari-Ferrari 1m 38.865s 11. Carlos Sainz Jr ESP Toro Rosso-Ferrari 1m 38.971s 12. Kevin Magnussen DEN Renault-Renault 1m 39.159s 13. Felipe Nasr BRA Sauber-Ferrari 1m 39.189s 14. Valtteri Bottas FIN Williams-Mercedes 1m 39.197s 15. Daniil Kvyat RUS Toro Rosso-Ferrari 1m 39.202s 16. Felipe Massa BRZ Williams-Mercedes 1m 39.281s 17. Jolyon Palmer GBR Renault-Renault 1m 39.455s 18. Romain Grosjean FRA Haas-Ferrari 1m 39.554s 19. Esteban Ocon FRA Manor-Mercedes 1m 40.086s 20. Esteban Gutierrez MEX Haas-Ferrari 1m 40.114s 21. Marcus Ericsson SWE Sauber-Ferrari 1m 40.219s 22. Pascal Wehrlein GER Manor-Mercedes 1m 41.131s Join in the discussion over at our Formula One sub forum. Catch the latest news, engage in the comments and discuss what's happening in the world of Formula One during the 2016 Grand Prix season. Do you think Nico Rosberg can extend his advantage in America and right the wrongs suffered during last years event? Will Ferrari find the extra pace to challenge for a victory this weekend? Will McLaren challenge for points on Sunday? Let us know in the comments section below!