The opening practice sessions were inconclusive .
It was n't until the Pre-Qualifying session that the # 57 car was able to break into the top 10 ; the other two Mercedes - AMG GT3s were secure in the mid-field of the massive 57 car entry .
The opening practice sessions were inconclusive , and it was n't until the Pre-Qualifying session that the # 57 car was able to break into the top 10 ; the other two Mercedes - AMG GT3s were secure in the mid-field of the massive 57 car entry .