Fruit and vegetables lend themselves to cross-promotions in many ways. As far back as the 1960s Cow and Gate linked longlife cream with Geest bananas. More recent examples are salad dressings in the prepacked salad range. Another route is coupons and giveaways. But Sainsbury appeared to have served an ace this week by prepacking a tennis ball in its Championships Marfona baked potato prepack in a joint promotion with Slazenger, a timely reminder of Wimbledon. {{M/E FRESH PRODUCE }}