Racing players walked off the pitch in protest over not being paid.
The Racing players released a joint statement on Monday announcing they would boycott the quarter-final second leg unless president Angel Lavin and his board stepped down.
That did not happen prior to kick-off and, although the home players turned up and completed their warm-up on Thursday, when the first whistle blew it soon became evident there would not be a contest.
Once Sociedad kicked off, the Racing players moved in and stood arm in arm around the centre circle, with substitutes and coaching staff lining up in solidarity on the touchline.
Sociedad passed the ball between themselves in their own half for a while before kicking it out for a throw-in, at which point the referee signalled that the match was suspended.
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