This is something that really separates Borg and Connors in '78. They ran close in total number of (official) titles, and in total number of losses. But Borg won 2 Slams to Connors' 1. It's true that World Team Tennis had diminished the strength of the RG field since '74; but in '78 there were fewer absences of top players at RG than at any time since WTT began. Six of the Top 20 were missing at RG -- the same number that were missing at Wimbledon. I think RG in '78 actually came out slightly ahead of Wimbledon in an evaluation conducted by WCT (the criteria were strength of field and prize money); someone made a post about this a year or two ago.