Top 5 Fastest Serves Ever in tennis
1. Sam Groth 163.7 mph (263.4 km/h)
2. Albano Olivetti 160 mph (257.5 km/h)
3. John Isner 157.2 mph (253.0 km/h)
4. Ivo Karlovic 156.0 mph (251.1 km/h)
5. Jerzy Janowicz 156 mph (251 km/h)
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