Two goals from an in-form Kluivert, the second a header, after the break settled the match after Pawel Kryszalowicz's 38th minute tap-in, the first Polish goal of the year, cancelled out the Dutch opener from a Frank de Boer free kick.

The Dutch made heavy work of the first half, allowing a few Polish breaks. Keeper Edwin van der Sar had to make two reasonable saves in the first 20 minutes and, after the Dutch had scored, they soon gave away their advantage.

Tomasz Rzasa broke through and although Van der Sar parried his shot Kryszalowicz was on hand to knock in the rebound.

The Dutch, however, proved they had too much class for their opponents in the second half as two of their substitutes set up Kluivert's double.

Peter van Vossen, who looked dangerous on the left, produced a perfect throughball for the Barcelona forward's first goal while Ronald de Boer, playing his first competitive game for some months, crossed five minutes later for Kluivert to head in at the near post. Dutch coach Frank Rijkaard said his side had given the ball away too much in the first half and looked on passively as Polish players fought for the ball.

'There was also too little communication at the back. So when their players switched they were able to push through,' Rijkaard said.

The Dutch players, who have had a week of mainly condition training in Switzerland, return to the Netherlands on Monday and regroup on Tuesday. They open their Euro 2000 campaign against the Czech Republic on Sunday.

Rijkaard now has five days to prepare his squad tactically and tend to a few lingering injuries. Defender Arthur Numan appears to be recovering from a minor strain, while Marc Overmars, left out of training for the last couple of days, has an injured thigh.

'We have been training fairly hard here and can now calmly build up for the first game,' said captain Frank de Boer.

Holland: 1-Edwin van der Sar; 2-Michael Reiziger, 3-Jaap Stam, 4-Frank de Boer, 5-Giovanni van Bronckhorst; 6-Aron Winter (19-Edgar Davids 46), 7-Phillip Cocu, 8-Clarence Seedorf (15-Paul Bosvelt 77), 9-Patrick Kluivert (17-Pierre van Hooijdonk 62), 10-Dennis Bergkamp (12-Ronald de Boer 46), 11-Boudewijn Zenden (14-Peter van Vossen 46).