RENO, Nevada -- Nevada and coach Brian Polian agreed to part ways Sunday after four seasons in which the Wolf Pack never broke .500 in Mountain West games.Polian, the son of former NFL executive and Pro Football Hall of Famer Bill Polian, was 23-27 since replacing Hall of Fame coach Chris Ault. Ault retired after the 2012 season.A former assistant at Notre Dame, Stanford and Texas A&M, Polian wasnt able to recreate the success the Wolf Pack had under Ault. Polian guided Nevada to bowl games and 7-6 seasons in years two and three.The Wolf Pack slipped to 5-7 this season, and 3-5 in the Mountain West. Nevada did finish the season with a 45-10 victory against rival UNLV. Polian was 13-18 in conference games overall and never better than 4-4 in a season.This decision is about finding a new head coach who will help us win a championship, and who will continue to build and strengthen relationships within our department, our campus, our alumni and our great community, athletic director Doug Knuth said in a statement. The support from those constituencies is vital to the success of building a championship program.Polian had one year left on his original five-year contract. His salary was $575,000 this season, according to USA Todays coaches salary database . Nevadas athletic budget ranks at the bottom of the 12-team Mountain West.Polians teams produced the two best Academic Progress Rate scores recorded by the program.I felt, and continue to feel, that we were building a solid foundation for this program, Polian said in a statement. However, this season was fraught with adversity and in the end, we did not win enough games. 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Compared to the 0.149s margin Nico Rosberg had over Max Verstappen in Spa-Francorchamps last weekend, it is proof the gap between Mercedes and the rest of the field has increased significantly on arrival in Monza.The high-speed Italian track is always a trade-off between downforce and drag, with teams bringing slimmer rear wings to maximise top speeds on the straights, but Ricciardo says Mercedes powerful engine means they can enjoy the best of both worlds.This weekend they have definitely shown their strengths again, he said. It looks like Mercedes have a pretty decent sized rear wing as well. It seems that when they want they can sort of turn it up. Then again here last year as well I remember Mercedes were on another planet. For whatever reason we expected to probably be a bit down here.dddddddddddd. Perhaps we have a bit more drag on the car as well, so maybe that is another element that hurts us here.Coming back to Singapore [in two weeks] I think we will be competitive again, and I still think relatively perhaps straight line speeds are not too bad, but the question is are we using less downforce than them which then masks it a little bit. If we can get top five here we will walk away pretty happy.Rather than battling Mercedes, Ricciardo has his sights on Williams Valtteri Bottas in fifth place on the grid instead.I think theyll be a contender tomorrow, Valtteris long run yesterday looked quite good, I believe he had a new soft, but his pace seemed pretty good. I think theyll remain strong in the race, especially with their straight line speed, theyll put up a fight. Massa I think is outside the top 10, so hell probably start on a soft and that could bring him into the race as well, so theyll be pretty strong. ' ' '