Moroccan striker Youssef Al-Nusairi scored early in the first half with a perfect shot from close range, and Sevilla could have extended their lead before the end of the first half.
Juventus, who looked toothless, fired their first shot on goal in the 65th minute but managed to score the equalizer in the dying moments of the game when defender Gatti headed the ball in from close range after a corner.
The two teams will meet next Thursday in the second leg at the Sanchez Pez Juan stadium.
The winner of them will play with the winner of the clash between Roma and Bayer Leverkusen in the final, which will be held on May 31 in Budapest.
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