India's Javagal Srinath was appointed as match referee for the first Champions Trophy semifinal between England and South Africa at the Oval on Wednesday.
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Kumar Dharmasena and Rod Tucker will be the on-field umpires while Bruce Oxenford and Steve Davis have been appointed as third and fourth umpires, respectively.
The following day, India and Sri Lanka go head to head in the second semi-final at Cardiff Wales Stadium. Richard Kettleborough and Aleem Dar will be the on-field umpires, with Nigel Llong and Ian Gould as third and fourth umpires, respectively.
The match referee will be Chris Broad.
Match official appointments 19 June - England v South Africa (d), The Oval - Kumar Dharmasena and Rod Tucker (on-field umpires), Bruce Oxenford (third umpire), Steve Davis (fourth umpire), Javagal Srinath (referee)
20 June - India v Sri Lanka (d), Cardiff Wales Stadium -Richard Kettleborough and Aleem Dar (on-field umpires), Nigel Llong (third umpire), Ian Gould (fourth umpire), Chris Broad (referee).