Celtic’s pursuit of a number-one goalkeeper has become the transfer story of the summer so far at Parkhead. There still isn’t a definitive indication of who could succeed Joe Hart, who has left big gloves to fill following his excellent three-year spell at the club. Newcastle United stopper Martin Dubravka, Bournemouth’s Mark Travers and Sparta Prague’s Peter Vindahl Jensen are thought to be among the prospective candidates; however, is does seem to have gone a bit quiet on the recruitment front. Over the past few years, Celtic have run a tight ship behind the scenes when trying to push deals …