are Horia Tecău and Heinz Günthardt nationals of the same country ?
Horia Tecău: Horia Tecău (] ; born January 19, 1985) is a Romanian tennis player currently ranked World No. 9 in doubles. 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.
no