(CNN) -- Petra Kvitova came down to earth with a bump after beating Kim Clijsters to win the Paris Open as she crashed out in the first round in Dubai Tuesday.
The 13th-seeded Czech had breezed past new world number one Clijsters in straight sets Sunday for her third WTA career title.
But the trip to the Gulf region left her looking tired and jaded and she lost in two tie-break sets 7-6 7-6 to Ayumi Morita, a Japanese qualifier.
Slovak Daniela Hantuchova, who claimed the Pattaya Open title in Thailand Sunday, also fell at the first hurdle.
She lost to Russian Anna Chakevetadze, who eased through 6-1 6-3 to earn a second round meeting with top seed Caroline Wozniacki.
Dane Wozniacki can regain the top ranking from Clijsters by reaching the semifinals in the Dubai Open this week.
Former world number one Ana Ivanovic was another first round casualty, beaten 4-6 7-6 6-2 by Swiss veteran Patty Schnyder.
The 32-year-old Schnyder was claiming her first win of the year after being hit by bronchitis and other health problems.
She recovered from a set and 3-1 down to the 14th-seeded Serbian to score a famous victory.
"It feels great to win, especially after what I've been through," she told AFP.
"She was taking the ball early and hitting it hard. I started to find my footwork a bit. I was kind of slow, but I hung in there."
Schnyder will now play Zheng Jie, the former Wimbledon semi-finalist from China, who took three sets to get past Kristina Barrois, a German qualifier.
Zheng's compatriot Peng Shuai is also through to the second round after a 6-2 3-6 6-3 win over Bethanie Mattek-Sands of the United States.