He also won the silver medal at the 2016 Olympic Games in Rio de Janeiro, alongside compatriot Florin Mergea.

He and his partner, Robert Lindstedt, defeated the pair of Tommy Robredo and Marcel Granollers in four sets in the quarterfinals and in the semifinals the duo of Juan Ignacio Chela and Eduardo Schwank.

At Wimbledon in the mixed doubles, he and his partner, fellow Romanian Monica Niculescu, lost in the second round to Marcelo Melo and Rennae Stubbs.

They had a good start and reached the final of the tournament but a calf injury of Lindstedt forced them to retire after just one set and thus losing the match to the Lukáš Dlouhý/Paul Hanley pair.

After the year's first Grand Slam, Horia decided to give his partner, Robert, time to recover and paired with experienced doubles player, Belgian Dick Norman, for the Zagreb Indoors.

Following the Zagreb title, Horia paired for the next two tournaments with Austrian Julian Knowle and Pakistani Aisam-ul-Haq Qureshi but with little success, exiting both competitions after the first round.

He then paired with fellow countryman Victor Hănescu for their biggest doubles title to date, the 500 point Mexican Open.

He won the 2016 BRD Năstase Țiriac Trophy[8] and the silver medal at the 2016 Olympic Games in Rio de Janeiro with Florin Mergea.

[10][11][12] However he postponed his retirement when he was called back to play doubles in the 2022 Davis Cup with Marius Copil where they won their match against Spain duo Alejandro Davidovich Fokina and Pedro Martínez (tennis).

[14] Tecău was chosen by Sony Pictures to dub Charles Darwin's voice in Romanian in the animated movie The Pirates!