On January 16, 2010, Tecău won his first ATP doubles title at the 2010 Heineken Open in Auckland, New Zealand, partnering Marcus Daniell.

Horia showed a solid game in the beginning of 2010 and won two doubles titles, (one Challenger and one ATP World Tour 250 Series), at Marrakech and Casablanca, which confirmed his good form.

He won his third doubles title at 's-Hertogenbosch and his second with partner Robert Lindstedt (his first with him came in Casablanca).

At the 2010 Wimbledon Championships, Tecău reached, for the first time in his career, a Grand Slam doubles final.
He and his partner, Robert Lindstedt, defeated the pair of Tommy Robredo and Marcel Granollers in four sets in the quarter finals, qualifying for the semifinals where they defeated the duo of Juan Ignacio Chela and Eduardo Schwank.
In the final Tecău and Lindstedt were defeated by the pair of Jürgen Melzer and Philipp Petzschner.

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.

At the 2010 Swedish Open, Lindstedt and Tecău won their third title together after winning in the final against Andreas Seppi and Simone Vagnozzi.

At the 2010 Farmers Classic, Tecău and Lindstedt were defeated by Eric Butorac and Jean-Julien Rojer in the quarterfinals.

At the 2010 Legg Mason Tennis Classic Tecău and Lindstedt were defeated by the pair of Marcos Baghdatis and Stanislas Wawrinka in the first round on the doubles category.

The fifth title of Tecău's career and fourth partnering Lindstedt came at the 2010 Pilot Pen Tennis.
The final saw them beating Rohan Bopanna and Aisam-ul-Haq Qureshi, this being their second title win against the Indian-Pakistani pair.
On January 16, 2010, Tecău won his first ATP doubles title at the 2010 Heineken Open in Auckland, New Zealand, partnering Marcus Daniell.
Horia showed a solid game in the beginning of 2010 and won two doubles titles, (one Challenger and one ATP World Tour 250 Series), at Marrakech and Casablanca, which confirmed his good form.
He won his third doubles title at 's-Hertogenbosch and his second with partner Robert Lindstedt (his first with him came in Casablanca).
At the 2010 Wimbledon Championships, Tecău reached, for the first time in his career, a Grand Slam doubles final. He and his partner, Robert Lindstedt, defeated the pair of Tommy Robredo and Marcel Granollers in four sets in the quarter finals, qualifying for the semifinals where they defeated the duo of Juan Ignacio Chela and Eduardo Schwank. In the final Tecău and Lindstedt were defeated by the pair of Jürgen Melzer and Philipp Petzschner.
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.
At the 2010 Swedish Open, Lindstedt and Tecău won their third title together after winning in the final against Andreas Seppi and Simone Vagnozzi.
At the 2010 Farmers Classic, Tecău and Lindstedt were defeated by Eric Butorac and Jean-Julien Rojer in the quarterfinals.
At the 2010 Legg Mason Tennis Classic Tecău and Lindstedt were defeated by the pair of Marcos Baghdatis and Stanislas Wawrinka in the first round on the doubles category.
The fifth title of Tecău's career and fourth partnering Lindstedt came at the 2010 Pilot Pen Tennis. The final saw them beating Rohan Bopanna and Aisam-ul-Haq Qureshi, this being their second title win against the Indian-Pakistani pair.
Horia Tecău