Against a team like Orlando who spread the court and primarily shoot 3's its obviously important to be able to close out on shooters.... that requires good discipline but also athleticism from your wings. Spurs were missing probably their two best guys at doing that in George Hill and James Anderson.. instead they had Gary Neal and Ime Udoka (

) taking those minutes which of course makes you suffer in that area.
Obviously there were alot of other contributing factors to getting blown out such as Manu not being Manu and DeJuan Blair still being DeJuan Blair.. but allowing the Magic to go 13-25 from 3... while letting Dwight go for 30 is a recipe for disaster.