Three races have been dropped from the 2014 Formula 1 calendar.

Grands Prix were provisionally listed to take place in Mexico, South Korea, and the American state of New Jersey which have meant a record-breaking 22-race season.

But problems surrounding the venues in Mexico, South Korea and New Jersey mean there will be 19 races next season.

Redevelopments of Mexico's Autodromo Hermanos Rodriguez is facing delays, while financial issues have plagued the New Jersey race. Both Grand Prix could still take place in 2015.