The Spaniards face Germany in the Euro 2008 finale on Sunday, looking to land their first major international title since they beat the USSR to secure the European title in 1964.
And Guiza, the Real Mallorca marksman, revealed that if he and his side were to be successful, he would enjoy a personal celebration by marrying his long-term girlfriend Nuria Bermudez.
The 27-year-old, was leading scorer in La Liga last season after a sensational season saw him score 27 goals, none of which were from the penalty spot.
"If I win the title with my country, we will go forwards and marry," said Guiza, who scored the clinching goal in the 3-0 semi-final victory over Guus Hiddink's Russia.