FINAL ROUND LEADERBOARD:
-11 J Morrison (Eng), A Quiros (Sp)* -10 A Canizares (Sp), R Jacquelin (Fra), M Foster (Eng) -9 P Waring (Eng), P Lawrie (Sco), N Colsaerts (Bel), S Dodd (Wal)
* Quiros wins at first play-off hole
Quiros has lifted his Ryder Cup chances with victory
Mark Foster saw his hopes of a first European Tour win in seven years dashed as two missed three-foot putts cost him victory at the Spanish Open.
Foster began the day with a three-shot lead but misses at 16 and 18 saw him finish one shot behind Spain's Alvaro Quiros and James Morrison.
They tied on 11 under par after 18 holes, forcing a sudden-death play-off.
Morrison double-bogeyed after placing his ball in the water, allowing Quiros a par which sealed a fourth Tour title.
Foster began the day unsteadily, with a bogey at the 3rd eradicating two shots of his overnight lead, while Quiros got his round off to a positive start with a birdie at the 2nd.
The field began to close in on the Englishman as the pressure got to him, and he ended the day with a round of 74 after bogeys at the 11th and 18th, tying for third on 10 under with Spain's Alejandro Canizares and Raphael Jacquelin of France.
Quiros, the world number 35, was the highest-ranked player in the tournament, while Morrison was playing in his first event since his inaugural victory in Madeira three weeks ago.
The former England youth cricketer carded a five under round of 67 to give himself a good chance of back-to-back wins in only the sixth and seventh Tour events of his career.
But when the pair re-played the 432-yard 18th at the start of the play-off, his form deserted him and his double-bogey handed victory to the home player, a win that puts Quiros seventh in the Ryder Cup points standings.
"I think it's one of the most important things in my life for sure," said Quiros afterwards.
"To be the winner of your Open is something really, really great - with the Ryder Cup and the World Cup it's the best three things in golf for me."
The victory means that Quiros joins Seve Ballesteros and Sergio Garcia as the only home winners of the Spanish Open since 1972.