Ukraine coach Oleg Blokhin has threatened to make major changes to his squad ahead of his country's World Cup finals debut in Germany.

Despite becoming the first European nation to seal qualification for the trip to Germany, Blokhin is concerned that several of his first-choice stars are not up to the challenge ahead.

He said: "We have only ten players from 23 in the squad list for World Cup 2006.

"I am disturbed with the fact that a lot of our players do not meet the high level of the national team. I will register some players of the youth national team for the World Cup."

Meanwhile, Ukraine have arranged two friendlies against Costa Rica in Kiev on May 28 and against Libya on June 5 in Volen, Switzerland.

Blokhin's side then take on Italy in Lausanne on June 2 and Luxembourg six days later, before making their World Cup bow against Spain in Leipzig on June 14.