Question: Are Ion Țiriac and Julian Knowle both Romanian tennis players?

Context paragraphs:
Julian Knowle: Julian Knowle (born 29 April 1974) is an Austrian male professional tennis player.  Being a born left-hander, Knowle is now one of the few on the ATP Tour who plays his forehand, backhand, and even volleys double-handed.  He was Austria's most successful doubles player in history by reaching world no. 6 in the ATP doubles rankings in January 2008, before being matched by Jürgen Melzer, who reached no. 6 in September 2010, and overtaken by Alexander Peya, who reached no. 3 in August 2013.

Țiriac Air: Țiriac Air (SC Ion Țiriac Air SRL) is a Romanian corporate charter airline with its head office at Henri Coandă International Airport near Bucharest, operating from Henri Coandă International Airport.  The airline operates helicopters and business jets, and is the sole Romanian operator to own a private VIP Terminal and hangar capability.  Tiriac Air operates as a maintenance base for Agusta helicopters under EASA Part 145 certification.

2014 PBZ Zagreb Indoors – Doubles: Julian Knowle and Filip Polášek were the defending champions, but Polášek decided not to participate.  Knowle played alongside Johan Brunström, but they lost in the quarterfinals to Marcelo Demoliner and Purav Raja.

Romanian Open: The Romanian Open (also known as the BRD Năstase Țiriac Trophy) was a professional men's tennis tournament played on outdoor clay courts.  It was part of the ATP World Tour 250 series of the ATP Tour.  It was held annually in Bucharest, Romania, since 1993.  Its name is taken from Romania's famous tennis players Ilie Năstase and Ion Țiriac.

2003 Croatia Open – Doubles: František Čermák and Julian Knowle were the defending champions but only Knowle competed that year with Lovro Zovko.

Ion Țiriac: Ion Țiriac (] ; born 9 May 1939), also known as the 'Brasov Bulldozer' is a Romanian businessman and former professional tennis and ice hockey player.  A former top 10 player, he is the winner of one grand slam title, the 1970 French Open in men's doubles.  Tiriac was the first man to play against a woman in a sanctioned tennis tournament (against Abigail Maynard, in 1975).  The highlight of his ice hockey career was participating as defenseman in the Romanian national team at the 1964 Winter Olympics.

Ion Țiriac Sports Complex: The Ion Țiriac Sports Complex is an outdoor sporting venue in Brașov, Romania, operated by the Brașov Sports High School, located within the same area.  It is named after the world-famous tennis player Ion Țiriac, who originates from Brașov.

2010 Pilot Pen Tennis – Men's Doubles: Julian Knowle and Jürgen Melzer were the defending champions, but Melzer chose not to participate this year.As a result, Knowle partnered with Andy Ram, but they lost to Robert Lindstedt and Horia Tecău in the semifinals.  Lindstedt and Tecău went on to win the tournament, after defeating Rohan Bopanna and Aisam-ul-Haq Qureshi in the final 6–4, 7–5.

2006 BMW Open – Doubles: Mario Ančić and Julian Knowle were the defending champions.  Ančić did not participate this year.  Knowle partnered with Jürgen Melzer, losing in the first round.

2016 UniCredit Czech Open – Doubles: Julian Knowle and Philipp Oswald were the defending champions, but Oswald chose not to compete this year. <br>Knowle instead competed with Marcelo Demoliner.  Demoliner and Knowle lost in the first round to Facundo Bagnis and Sergio Galdós.

Supporting paragraphs: Ion Țiriac Julian Knowle
Answer: no