Topley has taken 22 wickets in 22 T20s for EnglandDates: 16 October-13 November Venue: AustraliaCoverage: Ball-by-ball Test Match Special commentary on BBC Radio 5 Live Sports Extra, BBC Sport website & app; live text commentary with clips on BBC Sport website & appBowler Reece Topley is a doubt for England's opening match of the Men's T20 World Cup against Afghanistan on Saturday after injuring his left ankle.
The 28-year-old rolled his ankle when he stepped on the boundary sponge during a fielding drill on Monday.
He travelled from Brisbane to Perth - where Saturday's match will be played - in a protective boot, but England are hopeful the injury is not serious.
Topley, who has been in fine form, will be assessed throughout the week.
The left-armer took his best figures for England in both T20 and one-day international cricket - 3-22, and an England record 6-24 - against India in the summer.
Topley, who played all three of England's recent warm-ups against Australia, is in contention with fellow seamers Chris Woakes, Mark Wood, Sam Curran and Chris Jordan for a starting place.
David Willey could also come into the reckoning if Topley is not fit while Tymal Mills, another left-arm pace bowler, is in Australia as a travelling reserve and could be called up if the injury proves serious.
