BESIDES the end-of-season championship races such as the Chairman's Prize, the Champions and Chater Cup, the Kukri and Centurion Trophies and the Sha Tin and Happy Valley Vases, one of the best things about this time of the racing year is the battles which are thrown up each season for riding and training honours. Three handlers - John Moore, Patrick Biancone and Wong Tang-ping - are locked in a struggle for training supremacy. In the riding stakes Tony Cruz is a seemingly insuperable six clear of triple defending champion Basil Marcus, but the one jockey no one would want on their 'Daily Mail' is that man Marcus. His indomitable spirit shone through on Saturday where he bounced back from a sickening-looking fall to ride a perfect race on short-head scorer Foursome. He might then have taken Monday morning off trackwork, but he was in there on Wednesday morning, despite it being a raceday, for one important piece of work in his quest to close the gap on Cruz. That work was on the now Chris Cheung Ting-pong-trained Winning Wave who steps out for the eighth event at Sha Tin tomorrow with a certain B. Marcus in the plate. Indeed, Marcus has been on this one's back for all his serious hitouts over the past few weeks and it would not be a surprise to see Winning Wave go close despite this being a belated reappearance. Stable changes often revitalise a horse and Cheung, who took over Winning Wave from Kenny Kam at the end of last season, has his team in particularly good form. Not least Winning Wave who has really started to work fluently over the past month and it should be remembered that he has won well fresh in the past - at big odds too. His main rival is likely to be the Gary Stevens-ridden Make Merry who had no luck in running whatsoever behind Daiquiri last time out when held up for a run rounding the bottom bend and into the straight. He has done a stack of work since and looks a natural improver. Running through the card, Geoff Lane's Wind Tracker worked well from the barriers on Monday morning for Alan Munro and should be kept safe in all bets in the opening event. Lane has done well with basically the same raw material for the past two seasons and appears to have improved Wind Tracker since taking over his training. The gelding clearly had the measure of Golden Dragon in that jump out. Heading To Win is going to be hard to peg back in the griffin event from barrier one though if he is to be caught it could well be by Neville Begg's newcomer, Top Practitioner, who is a good type. Expect improvement, too, from John Moore's Win Theatre though this may still be a race too soon for him. Escalus has worked well enough in the blinkers and is another significant booking for Marcus for the third for which Lawrie Fownes seems to have Plenty Cash spot on. Stevens is an interesting booking for the latter as he is for Aim On Kris in the fourth who wouldn't appear to have as good a form chance as either Country Lad or Multi-Colours both of whom Stevens prevailed on last time out. There's a quality field assembled for the Sassoon Challenge Cup in which all eyes will be on the Ivan Allan-trained Mr Vitality who made such an impression when running right away from some quality rivals on his Hong Kong debut. The Golden Slipper fourth and Blue Diamond runner-up, has been off since with a runny nose, and his work leading into tomorrow's feature event suggests that the run will bring him on. Stephen Leung has the visor fitted on Flying High for the first time in this and his work has been simply impeccable.