![Tough road: Thanasi Kokkinakis has been plagued by shoulder and pectoral injuries.](/web/20161202135133im_/http://www.smh.com.au/content/dam/images/g/q/m/f/8/1/image.related.wideLandscape.460x259.gt23ht.png/1480644300999.jpg)
Kokkinakis faces a hard road, says Hewitt
What will be the big tennis story of the summer? Roger Federer's reappearance? A Nick Kyrgios charm offensive? For John Newcombe, one component will be a successful comeback from injury for Thanasi Kokkinakis, even as Lleyton Hewitt warns that the young South Australian faces a "tough" return after what has effectively been a year away.