World number one 3 times, won Wimbledon, US Open and French Open. I'd say he was a bit more than a "hyped up guy who was not very good".
Riggs v BJK 1973 Bobby Riggs was 55 and BJK was 29 not surprisingly BJK won convincingly in 6-3 in 3 sets. Riggs had a reputation as a showman, often promoting himself. He was also a prominent play between '39 - '47. Earlier he had walloped Margaret Court (35yr)
Nevertheless after her victory she warmly commended Riggs for his efforts and they both remained on good terms until Riggs death in 1995. Both had a sense of humour!