Former world number one Martina Hingis lost 6-4 6-0 to Agnieszka Radwanska in the Fed Cup as she returned to singles tennis after an eight-year absence.
The 34-year-old Swiss, a five-time Grand Slam singles champion, twice fought back from a break down in the first set before losing it.
Radwanska, the 26-year-old world number nine, then dominated a second set that lasted only 28 minutes.
Her victory gave Poland a 1-0 lead in the World Group play-offs.
Hingis, whose appearance makes her eligible for the 2016 Olympics in Rio, was expected to play only doubles in her first Fed Cup tie for 17 years.
The Swiss initially retired in 2003, aged 22, because of injuries. She returned in 2005 but retired again in 2007, which coincided with a
for a positive drugs test.
Hingis is scheduled to play Radwanska’s sister Ursula in the fourth rubber on Sunday before partnering Timea Bacsinszky in the concluding doubles match.
1-0 in their semi-final after Lucie Safarova beat Caroline Garcia 4-6 7-6 (7-1) 6-1.
The other semi-final features Russia and Germany.