The 2017 Ladies Open Biel Bienne was a women's tennis tournament played on indoor hard courts.
 It was the first edition of the Ladies Open Biel Bienne and part of the International category of the 2017 WTA Tour.
 It took place at the Swiss Tennis Center in Roger Federer Allee, Biel, Switzerland, from 10 April through 16 April 2017.
Max Ellmer (1909 – 1984) was a Swiss tennis player in the years before and after World War 2.
 Ellmer had a powerful backhand and good footwork.
 He played Davis Cup for Switzerland from 1933 to 1938.
 He won the Swiss Championships four times (1932, 1934, 1935 and 1936).
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 He played at the French Championships and Wimbledon in a Grand Slam singles career that spanned the years 1930 to 1949.
 At the French Championships in 1934, Ellmer beat the 13th seed Wilmer Hines and won a set from eventual winner Gottfried von Cramm in losing in the fourth round.
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 At Wimbledon in 1938, Ellmer beat 6th seed Dragutin Mitić in five sets before losing in straight sets to Bunny Austin in the quarter finals.
 Ellmer beat former champion Jack Crawford in round one of the Wimbledon men's singles in 1947 before losing in the second round.
Hendrik ("Henk") Timmer (] ; 8 February 1904 – 13 November 1998) was a Dutch sportsman, who primarily played tennis.
 Born in Utrecht, Timmer also won golf tournaments, became Dutch squash champion, played badminton and hockey.
 He died aged 94 in Bilthoven, four days before his former doubles partner Kea Bouman.
 Apart from being a Dutch tennis champion, he was Swiss, Welsh and Scottish indoors champion as well.
Anke Huber was the defending champion but lost in the first round to Denisa Chládková.
Martina Hingis (born 30 September 1980) is a Swiss professional tennis player, a former world No. 1 singles player and currently ranked world No. 2 in doubles by the WTA.
 She has spent a total of 209 weeks as the singles No. 1 and has won five Grand Slam singles titles, thirteen Grand Slam women's doubles titles, winning a calendar-year doubles Grand Slam in 1998, and seven Grand Slam mixed doubles titles; for a combined total of twenty-five major titles.
 In addition, she has won the season-ending WTA Championships two times in singles and three times in doubles, and an Olympic silver medal.
The Switzerland Davis Cup team represents Switzerland in the Davis Cup tennis competition and is governed by Swiss Tennis.
Chládková did not win any WTA titles, but she is probably best remembered for reaching the Wimbledon quarterfinals in 1997, playing in only her third Grand Slam main draw.
 In the second round, she stunned Lindsay Davenport for the first top ten win of her career, but eventually lost to the champion Martina Hingis.
Asen Tsankov (Bulgarian: Асен Цанков , 3 January 1912 – 1994) was a four-time Bulgarian tennis champion and one of the first Bulgarian Olympians, who participated at the Winter Olympics.
 He represented Bulgaria at the 1936 Winter Olympics held in the German city Garmisch-Partenkirchen.
 Tsankov participated in the alpine combined, where he was 53rd after the downhill and 45th after the first run of the slalom and did not qualify for the second run.
 Tsankov was Bulgarian tennis champion in 1939, 1940, 1941 and 1942.
Severin Lüthi (born 5 January 1976) is a Swiss tennis coach and former player.
 He has coached the Swiss Davis Cup Team for many years and has also been a long-time coach of Roger Federer.
Belinda Bencic (Slovak spelling Benčičová, born 10 March 1997) is a Swiss tennis player.
 Bencic has won two singles and two doubles titles on the Women's Tennis Association (WTA) tour, as well as three singles and two doubles titles on the circuit organized by the International Tennis Federation.

Question: Which Swiss tennis champion won against Denisa Chládková in 1997?
Answer: Martina Hingis