Louis Riddick discusses the Bills' AFC championship chances when their rivals have gotten better. (0:55)Why Louis Riddick questions whether the Bills can win the AFC (0:55)Open Extended ReactionsPITTSFORD, N.Y. -- Buffalo Bills wide receiver Khalil Shakir is "week to week" with a high right ankle sprain, coach Sean McDermott said Sunday. Shakir, 25, was MVP Josh Allen's top target last year, leading the Bills in receiving yards (821), catches (76) and targets (100). The Bills' receiving corps has dealt with a plethora of injuries in the first week of training camp. He will miss Sunday's practice alongside fellow safety Cole Bishop (quad), who has not practiced since sitting out of much of Tuesday's session.