Nico Rosberg was left 'really disappointed' at the end of the Italian Grand Prix last weekend after failing to score on Williams' 500th grand prix.
Following a strong run in practice and qualifying the signs were looking promising for the German ahead of the fourteenth round in this year's championship.
Indeed Nico ran well in the early stages, however, unexpected drying conditions meant an extra and unscheduled stop, which relegated him from a solid points finish to P14.
"The outcome today was really disappointing as we were in a great position with potentially the best strategy, but again I finished towards the back of the field," he lamented. "In the first stint I thought I should be able to maintain a good pace, but I really struggled with tyre degradation and I lost time to those in front of me.
"But what was really decisive today was the tyre decision for my stop, which really destroyed the possibility of a good finish in the points. Everyone else was staying on full wets, so we thought we were in a good position to do the same and to keep risk to a minimum. In any case, at that point there wasn't a dry line to see, but ultimately it proved to be the wrong choice."
Williams technical director Sam Michael agreed that the extra stop was costly: "It was a frustrating race to not be able to claim any points from a good starting position," he added.
"We struggled for pace on Nico's car in the first stint with a heavy fuel load and then unfortunately at his pit stop window we stayed on extreme wet tyres. But within a couple of laps, it became clear that the track had shifted to 'intermediate' tyres and we were forced to make another stop, which cost us 25 seconds, and this really hurt us."
Kazuki Nakajima meanwhile made a tactical decision to start from the pit-lane and make some aero modifications to his car which allowed him to progress six places at various intervals during the race, but ultimately he finished just outside the top ten in 12th and was also not able to claim any points.
"It was a difficult race today with many close decisions to take. Starting from the pitlane to allow me to make some aero changes was not penalising as we started behind the safety car and it was a very good decision from the team," he continued.
"In the early stages of the race, it was very difficult with the poor visibility and also I struggled with the braking, so the pace just wasn't there to begin with, but we changed from extreme wets to wets at just the right time and from then on my pace was much better."