He's smug
The guy has his own logo. He wears his own logo, whether it be a baseball cap, jacket, or pants. His family all wears baseball caps with his logo on them. To top it off, when he unwraps a new tennis racquet, it's in a clear plastic bag with the RF logo on it. It's hard to be more pretentious than to have your own logo.
Just like Tiger.
He does ads for Rolex, which reinforces the actually incorrect stereotype that tennis fans and players are a bunch of rich people with unlimited money to blow.
at the end of his recent Wimbledon victory, his 15th Grand Slam victory, a new all-time record. He was interviewed on court about how he felt about breaking the record, and he said that he doesn't pay attention to the records and it's all about tennis. Would be nice if that were true, but the interviewer made him turn around to reveal the '15' embroidered in gold on his RF-logo jacket that he pulled out of his bag after winning the match.
I could go on, but I got to go.