Question: are Horia Tecău and Heinz Günthardt nationals of the same country ?

Context paragraphs:
2009 Zenith Tennis Cup – Doubles: Yves Allegro and Horia Tecău were the defending champions, however Tecău chose to not participate.

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.

2009 Mamaia Challenger – Doubles: Florin Mergea and Horia Tecău were the defending champions.  Tecău didn't start this year.

2012 PBZ Zagreb Indoors – Doubles: Dick Norman and Horia Tecău were the defending champions but Tecău chose not to compete and Norman teamed up with James Cerretani.  They lost in the first round to Benjamin Becker and Alexander Waske. <br>

Horia Tecău: Horia Tecău (] ; born January 19, 1985) is a Romanian tennis player currently ranked World No. 9 in doubles.  He turned pro in 2003 and reached the men's doubles finals of the 2010, 2011 and 2012 Wimbledon Championships with Robert Lindstedt before winning it in 2015 with Jean-Julien Rojer, with whom he also won the 2017 US Open.  Tecău also won the 2012 Australian Open mixed doubles title with Bethanie Mattek-Sands and the 2015 ATP World Tour Finals with Rojer.

1981 Stockholm Open – Doubles: Heinz Günthardt and Paul McNamee were the defending champions, but McNamee did not participate this year.  Günthardt partnered Balázs Taróczy, losing in the first round.

1980 Geneva Open – Doubles: Željko Franulović and Balázs Taróczy won the title, defeating Heinz Günthardt and Markus Günthardt 6–4, 4–6, 6–4 in the final.

2014 Topshelf Open – Men's Doubles: Max Mirnyi and Horia Tecău were the defending champions, but Mirnyi chose not to participate.  Tecău played alongside Jean-Julien Rojer and successfully defended the title, defeating Santiago González and Scott Lipsky in the final, 6–3, 7–6.

2010 UNICEF Open – Men's Doubles: Wesley Moodie and Dick Norman were defending champions, but they lost in the semifinals against Robert Lindstedt and Horia Tecău. Lindstedt and Tecău won the final 1–6, 7–5, [10–7] against Lukáš Dlouhý and Leander Paes.

Heinz Günthardt: Heinz Peter Günthardt (born 8 February 1959 in Zürich) is a former tennis player from Switzerland, who won five singles titles during his professional career, including the Rotterdam WCT in 1980.

Supporting paragraphs: Horia Tecău Heinz Günthardt
Answer: no