John Peers
John William Peers ( born 25 July 1988 ) is an Australian professional tennis player who competed mainly on the ATP Challenger Tour both in singles and doubles until 2013 , when he began to focus solely on doubles and began competing on the ATP World Tour . 
<triplet> ATP Challenger Tour <subj> tennis <obj> sport <triplet> 2013 <subj> tennis <obj> sport <subj> 2013 <obj> point in time <triplet> ATP World Tour <subj> tennis <obj> sport