Defending world champion Sébastien Ogier, driving a Fiesta, took a slender 0.1 second lead over Andreas Mikkelsen.
Championship leader Thierry Neuville was another 0.6 second behind.
Elfyn Evans was fourth, followed by Hayden Paddon and Esapekka Lappi.
Teammate Teemu Suninen was seventh, while the shakedown winner Jari-Matti Latvala in eighth.
Mads Østberg and Ott Tänak were in ninth and tenth respectively to complete the top ten.
Defending world champion Sébastien Ogier, driving a Fiesta, took a slender 0.1 second lead over Andreas Mikkelsen. Championship leader Thierry Neuville was another 0.6 second behind. Elfyn Evans was fourth, followed by Hayden Paddon and Esapekka Lappi. Teammate Teemu Suninen was seventh, while the shakedown winner Jari-Matti Latvala in eighth. Mads Østberg and Ott Tänak were in ninth and tenth respectively to complete the top ten.
2018 Rally Italia Sardegna