Question: William Tatem Tilden II (February 10, 1893 - June 5, 1953), nicknamed "Big Bill," was an American male tennis player. He is often considered one of the greatest tennis players of all time. Tilden was the World No. 1 player for six years from 1920 through 1925. He won 15 Major singles titles including ten Grand Slam events, one World Hard Court Championships and four Pro Slam tournaments.

On 31 December 1930, in need of money, he turned professional and joined the fledgling pro tour, which had begun only in 1927. For the next 15 years, he and a handful of other professionals such as Hans Nusslein and Karel Kozeluh barnstormed across the United States and Europe in a series of one-night stands, with Tilden still the player that people primarily paid to see. Even with greats such as Ellsworth Vines, Fred Perry, and Don Budge as his opponents, all of them current or recent world no. 1 players, it was often Tilden who ensured the box-office receipts--and who could still hold his own against the much younger players for a first set or even an occasional match. Tilden thought he reached the apogee of his whole career in 1934 at 41 years old; nevertheless, that year he was dominated in the pro ranks by Ellsworth Vines. American Lawn Tennis reported that Vines had an edge of 11-9 in the first phase of their tour from January 10 through February 16 and that Vines led Tilden by 19 matches after the second phase of their tour, played from March 21 through May 17. Tilden had won 17 times for the entire year, per an Associated Press report, so a probable win-loss record at tour's end was 36-17 in Vines' favor. Both players then met at least 6 times during the rest of the year (Ray Bowers has listed 5 tournament matches and 1 one-night program), all lost by Tilden. In 1945, the 52-year-old Tilden and his long-time doubles partner Vinnie Richards won the professional doubles championship--they had won the United States amateur title 27 years earlier in 1918.

Using a quote from the above article, answer the following question: What was his win ratio?
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Answer: 36-17 in Vines' favor.

Question: Guillermo Barros Schelotto (Spanish pronunciation: [gi'yermo 'baros eske'loto]; Italian: [ske'lotto] born 4 May 1973) is an Argentine former football forward, and the current manager of Boca Juniors. Barros Schelotto played 16 years of his professional career in the Argentine Primera Division (6 with Gimnasia y Esgrima La Plata and 10 with Boca Juniors). With these two teams, he won a total 17 official titles (one with Gimnasia and 16 with Boca). In 2007, Barros Schelotto left Boca Juniors for Columbus Crew in the Major League Soccer, therefore having his first experience outside his native country.

Born with a twin brother, Gustavo, Barros Schelotto was hence nicknamed El Mellizo ("the twin"). He started playing professionally at the end of 1991 with his hometown team Gimnasia y Esgrima de La Plata, where he scored 45 goals in 181 matches in five seasons and in 1993 won the AFA Centenario Cup. On 14 September 1997 he transferred to Primera Division Argentina powerhouse Boca Juniors, for whom he played for almost 10 years. He was considered an idol by Boca fans and in his later years at the club showed his experience whenever he stepped on the pitch. Barros Schelotto remains one of Boca's top scorers in international matches with 25 goals, just one goal behind former teammate Martin Palermo. In 1996, he was offered to play for River Plate, but after club icon Enzo Francescoli was not happy with the potential signing, the deal collapsed. In mid-1997, Boca Juniors showed interest for him and his brother Gustavo. It was like that that Barros Schelotto twins arrived to Boca teaming up to a former rival: Martin Palermo, Gimnasia's archrival Estudiantes de La Plata former player. The three of them were repeatedly recommended to Boca by Diego Maradona, who was playing his last season for the Buenos Aires team, retiring on October the same year. Once in Boca, he made his debut as a substitute for Claudio Caniggia, scoring on 14 September 1997 against Newell's Old Boys in a 2-1 victory. With Carlos Bianchi as Boca Juniors' coach, Barros Schelotto got his traditional 7 shirt and kept it until 2006-07 season. He and former rival Martin Palermo became a successful attacking duo, who highly contributed in the 1998-99 title-winning season. He missed the 2001 and 2003 clubs international achievements due to injuries. In 2003, he was a key piece in the winning Copa Libertadores side, with his peak performance at the Round of 16 match against Brazilian team Paysandu, where he scored a hat-trick and assisted Marcelo Delgado's goal. In the second half of 2003 he again suffered from injuries and could only play for 46 minutes in the Copa Intercontinental winning match against AC Milan, when he replaced Carlos Tevez. With Alfio Basile as Boca coach, his participation in the first team was gradually lowering. He even was out of some first team matches and had to play for the second team to maintain his performance level. He scored 87 goals in 302 games for Boca Juniors.

Using a quote from the above article, answer the following question: when did he start playing soccer in argentina?
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Answer:
He started playing professionally at the end of 1991