Question: Are both Vitas Gerulaitis and Ross Case tennis players?

Context paragraphs:
Snauwaert: Snauwaert is Belgian tennis racquet brand and manufacturer of other tennis equipment.  It was founded in 1928 by the brothers-in-law Valler Snauwaert and Eugeen Depla.  The company went out of business in 1994.  Famous tennis players that used Snauwaert include Vitas Gerulaitis, Evonne Goolagong Cawley, Miloslav Mečíř, Mikael Pernfors, Tomáš Šmíd and Brian Gottfried.

1976 Wimbledon Championships – Men's Doubles: Vitas Gerulaitis and Alexander Mayer were the defending champions, but they lost to eventual finalists Ross Case and Geoff Masters in the Quarterfinals.

Kim Warwick: Kim Warwick (born 8 April 1952) is an Australian former professional male tennis player who competed on the ATP Tour from 1970–1987 reaching the final of the singles Australian Open in 1980.  He defeated over 35 players ranked in the top 10 including Guillermo Vilas, Raul Ramerez, Vitas Gerulaitis, Jan Kodeš, Bob Lutz and Arthur Ashe.  Warwick's career-high singles ranking was World No. 15, achieved in 1981.  He won three singles titles and 26 doubles, including Australian Open 1978 (with Wojtek Fibak) and Australian Open 1980 and 1981, Roland Garros 1986 and also a runner-up in Australian Open 1985, all of them partnering fellow countryman Mark Edmondson.  Partnering with Evonne Goolagong, he won the French Open 1972, defeating Françoise Dürr and Jean-Claude Barclay in the final 6–2, 6–4.  Evonne and Kim were finalists in 1972 at Wimbledon against Rosie Casals and Ilie Năstase who won 6–4, 6–4.

1978 World Championship Tennis Finals: The 1978 World Championship Tennis Finals was a men's tennis tournament played on indoor carpet courts.  It was the 8th edition of the WCT Finals and was part of the 1978 Colgate-Palmolive Grand Prix, as the World Championship Tennis and the Grand Prix circuits were now combined.  It was played at the Moody Coliseum in Dallas, Texas in the United States and was held from May 9 through May 14, 1978.  Third-seeded Vitas Gerulaitis won the title and $100,000 first-prize money.

1977 Italian Open – Men's Singles: Adriano Panatta was the defending champion but lost to Vitas Gerulaitis in the quarterfinals.  Gerulaitis claimed the title after defeating Antonio Zugarelli in the final.

1977 Italian Open (tennis): The 1977 Italian Open was a combined men's and women's tennis tournament that was played by men on outdoor clay courts at the Foro Italico in Rome, Italy.  The men's tournament was part of the Colgate-Palmolive Grand Prix circuit while the women's tournament was part of the Colgate Series.  The tournament was held from 16 May through 22 May 1977.  The singles titles were won by eight-seeded Vitas Gerulaitis and fifth-seeded Janet Newberry who earned $21,000 and $6,000 first-prize money respectively.  Gerulaitis competed despite being contracted to play for the Indiana Loves World Team Tennis (WTT) franchise and was fined $19,000 for failing to play Björn Borg in the weekend of the final.

1980 French Open – Men's Singles: Björn Borg was the two-time defending champion of the Men's Singles event at the French Open tennis tournament.  Seeded first he successfully defended his title at the 1980 French Open, defeating Vitas Gerulaitis 6–4, 6–1, 6–2 in the final to win his fifth French title after 1974, 1975, 1978 and 1979.  Borg went through the entire tournament, which featured 17 of the top 20 players, without dropping a set; this would not be achieved by a man again until Roger Federer at the 2007 Australian Open.

Vitas Gerulaitis: Vytautas Kevin Gerulaitis (July 26, 1954 – September 17, 1994) was an American professional tennis player.  In 1975, Gerulaitis won the men's doubles title at Wimbledon, partnering with Sandy Mayer.  He won the men's singles title at one of the two Australian Open tournaments held in 1977 (Gerulaitis won the tournament that was held in December, while Roscoe Tanner won the earlier January tournament).  Gerulaitis also won two Italian Open titles, in 1977 and 1979, and the WCT Finals in Dallas, in 1978.

Ross Case: Ross Case (born 1 November 1951) is an Australian former tennis player.  His career-high singles ranking was world no. 14.

Port Washington Tennis Academy: The Port Washington Tennis Academy, located in Long Island, New York, is the largest indoor tennis facility on the U.S. East Coast, with 17 indoor courts.  Founded in 1966 as a non-profit tennis facility, it has an internationally acclaimed junior tennis development program.  John McEnroe (under coaches Tony Palafox and Stanley Matthews) and Vitas Gerulaitis developed their games here, and famed Australian coach Harry Hopman worked at the facility late in his life.

Supporting paragraphs: Vitas Gerulaitis Ross Case
Answer: yes