Sitting on the beach in Cabo De Gato en Espana at the moment having had a lovely lunch and a small glass of vino rioja. I have to say take it easy on the long long run. You have done enough. Drop down to 14 or 16 if you have too in the week. After a shower I will be heading off for a slow long run of about 12 miles. Good luck with knee and nurse it as you did today.