Fears of blocks of empty seats for Chelsea's Club World Cup semi-final against Fluminense have prompted a number of stars to promote ticket sales on their own social media pages

EAST RUTHERFORD, N.J. — FIFA cut standard ticket prices for the semifinal between Chelsea and Fluminense at MetLife Stadium in East Rutherford, New Jersey, on Tuesday to $13.40 from $473.90 earlier in the past week. FIFA has used dynamic pricing for the 63-game tournament. The cheapest tickets as of Monday morning were $22.30.