Right from the start, the drivers who were members of the Grand Prix Drivers Association were furious that the barriers were not bolted together properly. Thus, they went on strike. Most of the sport's major players refused to take part in practice. Jacky Ickx was not a member of the GPDA, and one of the few marquee drivers who did practice.
Track staff worked overnight to fix the barriers, and to make sure everything would be fixed in time for qualifying on Saturday, some of the teams sent out mechanics to help. The drivers, though, still were not convinced, but the race organizers threatened legal action if no race was run. This, and rumors that the Guardia Civil would seize the cars which were in the paddock, which was at MontjuĂŻc Stadium , forced the drivers to call off the strike.
The defending World Champion Emerson Fittipaldi , however, was still furious. He did the minimum three laps, but at a very slow pace, then pulled into the pits.