I still have Laver as the world's best player in 1970 due to his dominance throughout the year, despite his poor showings at Wimbledon and the US Open. Laver was probably seen as the best player in a given match up to 1973 by the experts, fans and players. However in 1971-1973, his consistency was dropping off a bit and his record in the majors continued to be very poor by his standards.
In the 1970s, Laver had just 1 quarter final appearance in a major. It was shocking when Roger Taylor beat Laver at 1970 Wimbledon, and then more upsets happened and the surprise wore off bit by bit when Dennis Ralston beat Laver at the 1970 US Open, Mark Cox beat him at the 1971 Australian Open and then Tom Gorman beat him at 1971 Wimbledon. Those were terrible losses for Laver, and there's no getting around it. In the 1960s, Laver nearly always found ways to win these matches.