Spielberg, Austria - Triple world champion Lewis Hamilton smashed his Red Bull Ring lap record twice in Austrian Grand Prix practice on Friday, with Ferrari's championship leader Sebastian Vettel close behind his Mercedes rival.
The two, separated at the top by 14 points after eight races, got back down to business after calming a 'road rage' controversy that has dominated Formula One since the previous race in Azerbaijan in June.
Hamilton, the only driver on the current grid to have won in Austria following the retirement of 2016 champion and team-mate Nico Rosberg, swiftly demolished the lap record he set in 2016. He then lowered his morning time by another half second in the afternoon to end the day with a best time of 1m05.483s.
In changeable conditions in the scenic Styrian hills, with bright sunshine mixed in with the occasional rain shower, four times world champion Vettel was second on the timesheets with a lap 0.147s slower than Hamilton's.
Red Bull's Dutch teenager Max Verstappen had been second in the morning, when Vettel was only fourth and half a second off the pace.
Mercedes has won every year since Austria returned to the calendar in 2014, after being absent for a decade, with Hamilton triumphant in 2016.
Hamilton and his Ferrari rival have been closely matched on race pace, with each winning three Grands Prix so far this season.
Vettel will be happy to have the focus back on the racing after making a public apology to Hamilton for the Baku furore in June and his comments afterwards.
He had driven into the back of Hamilton's car, while the race leader was waiting for the safety car to pit, and had pulled alongside to remonstrate. He ultimately finished fourth, a place ahead of Hamilton. He then accused Hamilton of "brake-testing" him, words he retracted this week.
Hamilton's team-mate Valtteri Bottas was third fastest in both sessions, with Verstappen dropping back to fourth in the afternoon after being sidelined early in the session with a brake problem.
Red Bull's Azerbaijan race winner Daniel Ricciardo and Ferrari's Kimi Raikkonen were fifth and sixth in both.
Ricciardo injected some Australian humour into the build-up when he jokingly said, while struggling to keep a straight face, that Baku had changed everything.
"I always said I want to win five races and retire so I'm probably not going to compete this weekend," he smiled. "I think I'm done. So it's changed pretty dramatically my position in the sport."
He then reassured "people at home who don't understand my silly sense of humour" not to worry.
1 Lewis Hamilton (Britain) Mercedes - 1m05.483s
2 Sebastian Vettel (Germany) Ferrari - 1:05.630
3 Valtteri Bottas (Finland) Mercedes - 1:05.699
4 Max Verstappen (Netherlands) Red Bull - 1:05.832
5 Daniel Ricciardo (Australia) Red Bull - 1:05.873
6 Kimi Raikkonen (Finland) Ferrari 1:06.144
7 Kevin Magnussen (Denmark) Haas - 1:06.591
8 Fernando Alonso (Spain) McLaren - 1:06.732
9 Nico Hulkenberg (Germany) Renault - 1:06.735
10 Romain Grosjean (France) Haas - 1:06.763
11 Esteban Ocon (France) Force India - 1:06.849
12 Stoffel Vandoorne (Belgium) McLaren - 1:06.859
13 Daniil Kvyat (Russia) Toro Rosso - 1:06.906
14 Felipe Massa (Brazil) Williams - 1:07.065
15 Carlos Sainz Jr (Spain) Toro Rosso - 1:07.100
16 Lance Stroll (Canada) Williams - 1:07.468
17 Sergio Perez (Mexico) Force India - 1:07.509
18 Jolyon Palmer (Britain) Renault 1:07.623
19 Pascal Wehrlein (Germany) Sauber - 1:08.782
20 Marcus Ericsson (Sweden) Sauber - 1:08.870\