Things got worse after the tragic deaths of Ayrton Senna and Roland Ratzenberger at the San Marino Grand Prix . Wendlinger was seriously injured in a crash during practice for the Monaco Grand Prix . The season took a turn for the worse when , at the race following the tragic deaths of Ayrton Senna and Roland Ratzenberger at the San Marino Grand Prix Wendlinger was seriously injured in a crash in practice for the Monaco Grand Prix .