Novak Djokovic eyes Pete Sampras' year-end No. 1 record

Novak Djokovic said it will be "amazing" to equal childhood idol Pete Sampras's all-time record of ending the year as world number one on six occasions. Djokovic will make sure he matches the great American by winning two matches at this week's Vienna ATP tournament. The 33-year-old Serb has been the top-ranked player at the end...