Continue reading... " BOULDER, Colo. - A sense of optimism is surrounding Colorado tennis coach Nicole Kenneally and her team as they head into Sunday's season opener against Air Force. The Buffaloes are coming off their first .500 season in six years and return four of their top five players from a year ago, while adding three impact newcomers. But the task of playing in the toughest conference in college tennis requires constant focus to compete with the best. "I believe we've gotten better, but there are other teams in the Pac-12 that have improved as well," Kenneally said. "Home and away is important. You've got to win at home and you've got to look to snag [upsets] on the road. I do believe we are in the best conference in the country. We've got four of the top [nine] teams in the country." Indeed the Pac-12 schedule can be brutal. The conference features No. 2 Southern California, No. 6 California, No. 8 Stanford and No. 9 UCLA, as well as five other teams ranked in the Intercollegiate Tennis Association preseason top 75. The Buffs may be viewed as an underdog, but they know what they have to do to compete. ... Colorado will host Air Force at 11 a.m. on Sunday at the Rocky Mountain Tennis Center, formerly the Millennium Harvest House. "