Real Betis will play Valencia in the final of Spain's Copa del Rey after Borja Iglesias' dramatic 91st-minute goal sealed a 1-1 draw with Rayo Vallecano on Thursday and a 3-2 win on aggregate. After losing the first leg 2-1 at home, Rayo thought they had forced extra-time when Bebe stunned the Benito Villamarin by scoring a brilliant free-kick with 10 minutes remaining. But Betis struck again, Borja bundling in at the back post in injury-time to send them through to the final, which will be played in their home city of Seville at La Cartuja on April 23. "When we went 1-0 down, the team didn't despair, they kept calm and looked for another goal," said Betis coach Manuel Pellegrini. "Getting to the final is a great achievement." Borja's goal came after a superb through-ball by the 40-year-old Joaquin, who came off the bench, 22 years after making his first appearance for Betis in the Copa del Rey.