Absolutely, Venus and Serena are having perhaps there worst season ever.
Serena has 1 title to her name, no grand slams and has lost to plaers she would not have lost to in previous years.
Venus has had trouble with injuries, lack of apparent motivation, and mental strength, her titles outnumber Serena yet she hasnt made it past the Quarters of the slams.
Serena has lost to Jennifer twice this year, and lets face it, Jen hasnt exactly played killer tennis herself...so that just shows you how far Serena has to go. Same with Venus.