Canadian wildfire smoke creates hazy conditions for the World Cup final. Mikel Merino and Spain aim to ignore external factors affecting the game. Experts express concern over outdoor practice sessions held in hazardous air. Rain is expected Saturday, followed by potential further smoke infiltration. Forecasts remain uncertain regarding Sunday's air quality for players and fans.

All you need to know about the World Cup final weather as wildfire smoke complicates the forecast

With the sun obstructed by haze, Spain’s players practiced ahead of the World Cup final outside in northern New Jersey while air conditions are hazardous because of smoke from…