Venus, who had her left leg and hip taped, said: "Serena and I have taken a lot of flak, so I felt I had to take one for the team. It hasn't been easy. Serena and I, we've been blamed for a lot of things that never even happened.
"I think everyone's quite familiar with the history. So today was a good effort. And I wanted to play. I had to at least show up and go out on the court."
Serena sat next to her sister as they waited for the presentation ceremony and is concerned the injury, which hampered her elder sister at the French Open, will still be a factor at the US Open next month.
"I just hope she hasn't injured herself more due to the fact she played," said the champion.
Meanwhile, Martina Navratilova tied one Wimbledon record and set another. She won her 20th title at the All England Club, teaming up with Leander Paes to defeat Israel's Andy Ram and Russia's Anastassia Rodionova 6-3, 6-3 in the mixed doubles final. She's now tied with Billie Jean King for the most Wimbledon titles.
At age 46, Navratilova's also becomes the oldest Wimbledon champion, supplanting American Margaret duPont, who was 44 in 1962 when she also took the mixed doubles title.