COLLEGE STATION, Texas - After eight matches and two days of competition the semifinal rounds of the Big 12 Tennis Championships are set at the George P. Mitchell Tennis Center. On the women's side, the top four seeds (No. 1 Texas Tech, No. 2 Baylor, No. 3 Texas A&M and No. 4 Texas) all advanced, while third-seeded Baylor and fifth-seeded Texas A&M both won first-round men's matches to join the top two seeds (No. 1 Oklahoma and No. 2 Texas Tech) in the semifinal round.
Both men's semifinal matches will begin at 11 a.m., while the women's action is slated to start at 2 p.m. on Saturday.
Here is how the top four women's seeds advanced out of quarterfinal play.
 Texas Tech 4,  Missouri 1 | Results & Quotes
Top-seeded and 21st-ranked Texas Tech (19-4) secured the doubles point with an 8-2 win at No. 3 and then an 8-6 victory by the 28th-ranked duo of Samantha Adams and Kenna Kilgo over the No. 83 team of Jamie Mera and Nina Pantic at the No. 1 spot. Pantic, however, would rebound from the doubles loss to post a 6-1, 6-1 victory at No. 1 singles. However, that point would be the only one MU got on the day as Texas Tech continued its strong play at the bottom of the lineup to tally straight set victories at the No. 4, 5 and 6 spots.TTU is now 66-8 at those positions on the year. Missouri, ranked No. 49, falls to 11-12 on the season. The Lady Raiders will now face the only team that beat them in league action, Texas.
 Texas 4,  Oklahoma State 1 | Results & Quotes
A dominating doubles performance boosted the 13th-ranked Texas Longhorns (15-7) to a 4-1 win over the No. 37 Oklahoma State Cowgirls (11-9) only five days after OSU had bested Texas in Stillwater. In that match, the Cowgirls won the doubles point, but UT got an 8-1 victory from its No. 3 team and an 8-3 win at No. 2 to take today's first point. In singles, two straight set victories at the No. 1 and 5 positions propelled the Longhorns to the brink of victory. However, the Cowgirls did not go quietly as Meghan Blevins scored a win at No. 3 to give OSU its lone point. Texas clinching point came as Cierra Gaytan-Leach overcame a first-set loss to win at the No. 5 spot.
 Baylor 4,  Oklahoma 1 | Results & Quotes
The 12th-ranked Lady Bears (23-6) will play in their ninth straight Big 12 semifinals, after taking down 47th-ranked Oklahoma (11-13), 4-1. BU lost the first doubles match of the day as OU's Marie-Pier Huet and Whitney Ritchie upset the 13th-ranked pair of Ema Burgic and Nina Secerbegovic at the No. 1 spot, 8-5. With the matches at No. 2 and 3 in doubt when the upset occurred, Baylor responded by pulling away for 8-5 victories at both positions. The singles matches were equally as hard fought. Baylor first got a 6-1, 6-2 win at the fifth spot to take a 2-0 lead. From there the Lady Bears won first set tiebreakers at the No. 4 and 6 spots to propel them to straight set wins at those positions. However, before the fourth point could be clinched OU's Whitney Ritchie came from behind to upset 15th-ranked Diana Nakic, 0-6, 7-5, 6-2, at No. 1 singles. BU will now face Texas A&M in the semifinals. During the regular season, Baylor beat the Aggies 5-2 in Waco.
 Texas A&M 4,  Kansas State 0 | Results & Quotes
The 19th-ranked Texas A&M Aggies claimed the lone sweep of the day on the women's side by posting a 4-0 victory against 67th-ranked Kansas State (8-14). TAMU (17-4) won the doubles point with victories at the No. 1 and 2 positions coming around a loss at the No. 3 spot. In singles, the Aggies tallied straight-set wins at No. 1 and 4 singles, before Janelle Cuthbertson stormed back from being down a set to earn a 3-6, 6-2, 6-1 decision at the five spot to clinch the match. Texas A&M has now made the semifinals at each Big 12 Championship, except in 1999.
Here is how the Baylor and Texas A&M men advanced to the semifinals.
 Baylor 4,  Oklahoma State 0 | Results & Quotes
The 28th-ranked Baylor Bears, opened the championship with a commanding 4-0 victory over sixth-seeded Oklahoma State (7-14). BU captured wins at No. 2 and 3 doubles by identical 8-1 scores to secure the point. In singles action, Baylor (16-10) won all six first sets and then parlayed that into three straight-set victories at courts 1, 5 and 6. The Bears will now face second-seeded and 19th-ranked Oklahoma at 11 a.m. on Saturday. Barring an NCAA selection, Friday's loss marked the end of the 40-year career of Cowboy coach James Wadley. The longest tenured coach in OSU history in any sport finishes his career with a 664-334 record.
 Texas A&M 4,  Texas 2 | Results & Quotes
In the fourth meeting of the year between the Aggies and the Longhorns, No. 34 Texas A&M (13-13) tied the series at two matches apiece with a 4-2 upset victory. As in the previous three meetings the doubles point winner won the match. TAMU got an 8-3 upset win from the 47th-ranked tandem of Junior Ore and Jackson Withrow over UT's No. 36 pair of Chris Camilone and David Holiner at the No. 1 spot. Texas (16-9) responded with an 8-2 win at No. 2, before the Aggie team at the No. 3 position clinched the point with an 8-5 victory. In singles, Texas claimed two of the first three singles matches off, but was unable to secure another point on the day as Texas A&M won at positions 1, 5 and 6 to clinch the triumph. The Aggies will now face No. 1 seed Oklahoma in semifinal action at 11 a.m. on Saturday.
Stadium Club reserved seating all-session tickets are $30 each and general admission all-session tickets are $15 each. The all-session tickets are available for advance purchase anytime at AggieAthletics.com, or by calling the ticket office at 1-888-99-AGGIE or in person at the ticket window located in The Zone at Kyle Field between 8 a.m.-5 p.m. Single-day tickets will be sold on site on the day of the event.
For complete results, photos and quotes for all of the matches at the 2012 Big 12 Tennis Championships visit the championship central page on Big12Sports.com.