The International Gymnastics Federation (FIG) sanctioned event is scheduled to begin tomorrow and conclude on Sunday (June 4) at the Pabellón Multiusos Guadalajara.

Harnasko arrives at the competition having won two medals at the recent European Championships in Budapest.

The 15-year-old claimed team silver as well as individual bronze in the ball discipline.

Mazur, a multiple World and European Championships medallist, will also be expected to challenge in the women's individual event in Guadalajara.

Israeli's Victoria Filanovsky could also be in contention for a medal, while Natalia García and Sara Llana will lead the charge for the host nation.

Russia, Belarus and Ukraine are among the favourites in the team event, with Spain also hoping to deliver success in front of their home crowd.

The event begins with individual and group qualification tomorrow and Saturday (June 3), before finals bring the competition to a close on Sunday.

The FIG World Challenge Cup will also celebrate the 25th anniversary of the Olympic Games in Barcelona.

Tributes will be paid to Spanish rhythmic gymnast Carolina Pascual, who won a silver medal in the ball event at her home Olympics back in 1992.

"We are delighted to present this great event that year after year we started with a lot of enthusiasm," Royal Spanish Gymnastics Federation President Jesús Carballo said.

"This event, in its second edition, begins to be a very important reference at international level. 

"Last year was a very good edition, with an intensity and with absolute fullness and passion. 

"I hope that this year we will also be able to endure the pull of a demanding competition but that we will enjoy it."