Mexico dented New Zealand's chances of retaining the World Baseball Softball Confederation Men's Softball World Championship title after defeating them in Havlíčkův Brod.
Mexico mounted an impressive comeback at Hippos Arena en route to their first win of the tournament, having trailed 4-1 in the seventh innings.
Nick Hayes then scored three runs to tie the game and force an extra innings, where Marco Antonio Gonzalez made it 5-4 through a run batted in.
New Zealand's loss advantaged Japan, who beat hosts Czech Republic 4-3 to top Group A with three wins from three.
Argentina secured their second victory with a 15-0 thrashing of Philippines, while Cuba have the same record after overwhelming Botswana 6-0.
In Group A, Canada and Venezuela are unbeaten.
Venezuela edged past Denmark 1-0 at Svoboda Ballpark in Prague, before Canada enjoyed a more comfortable 4-1 win against Australia.
The Netherlands recorded an impressive 13-0 drubbing of Singapore, while the United States beat South Africa 8-1.
The group stage continues tomorrow.