Sterigarda Ducati's Shane Byrne has set the early pace at a soaking Portimao track this morning. He is just less than a second quicker than Ten Kate Honda's Jonathan Rea.

The reigning British Superbike Champion is the only rider to dip under the 2min lap barrier. Xerox Ducati's Michel Fabrizio is third quickest with Max Neukirchner fourth.

Twenty three riders have so far ventured out on circuit. Yamaha's Ben Spies and Stiggy Honda's Leon Haslam have opted to stay in the garage.

Superbike session one times:

1 67 Byrne S. (GBR) Ducati 1098R 1'59.151
2 65 Rea J. (GBR) Honda CBR1000RR 2'00.081
3 84 Fabrizio M. (ITA) Ducati 1098R 2'00.521
4 76 Neukirchner M. (GER) Suzuki GSX-R 1000 K9 2'01.437
5 96 Smrz J. (CZE) Ducati 1098R 2'01.487
6 24 Roberts B. (AUS) Ducati 1098R 2'01.499
7 41 Haga N. (JPN) Ducati 1098R 2'02.142
8 33 Hill T. (GBR) Honda CBR1000RR 2'02.190
9 71 Kagayama Y. (JPN) Suzuki GSX-R 1000 K9 2'02.206
10 7 Checa C. (ESP) Honda CBR1000RR 2'02.221
11 53 Polita A. (ITA) Ducati 1098R 2'02.255
12 11 Corser T. (AUS) BMW S1000 RR 2'02.291
13 66 Sykes T. (GBR) Yamaha YZF R1 2'03.913
14 99 Scassa L. (ITA) Kawasaki ZX 10R 2'04.519
15 36 Lavilla G. (ESP) Honda CBR1000RR 2'04.604
16 23 Parkes B. (AUS) Kawasaki ZX 10R 2'05.292
17 55 Laconi R. (FRA) Ducati 1098R 2'05.626
18 25 Salom D. (ESP) Kawasaki ZX 10R 2'05.880
19 3 Biaggi M. (ITA) Aprilia RSV4 2'05.904
20 77 Iannuzzo V. (ITA) Honda CBR1000RR 2'06.198
21 100 Tamada M. (JPN) Kawasaki ZX 10R 2'06.459
22 111 Xaus R. (ESP) BMW S1000 RR 2'07.094
23 56 Nakano S. (JPN) Aprilia RSV4 2'13.713

Supersport session one times:

1 35 Crutchlow C. (GBR) Yamaha YZF R6 2'05.219
2 117 Praia M. (POR) Honda CBR600RR 2'05.270
3 14 Lagrive M. (FRA) Honda CBR600RR 2'05.713
4 50 Laverty E. (IRL) Honda CBR600RR 2'06.243
5 8 Aitchison M. (AUS) Honda CBR600RR 2'12.833
6 69 Nannelli G. (ITA) Triumph 675 2'15.043
7 28 Vos A. (NED) Honda CBR600RR 2'15.353
8 5 Pradita Doni T. (INA) Yamaha YZF R6 2'18.856
9 99 Foret F. (FRA) Yamaha YZF R6 2'21.017