Judy Murray: ‘I've got a photo of Andy in his high chair with a bowl of custard over his head’

The tennis coach on why her sons’ first matches were over the kitchen table, and the dangers of eating cake at Wimbledon

I’ve got a great photo of Andysitting in his high chair at my kitchen table, with a bowl of custard tipped over his head. When the kids were young I’d work on that table – that was my office, where spreadsheets were laid out. The first games of tennis Jamie and Andy played were on that table. They put cereal boxes across the middle as a net.

My mumfed me and my two younger brothers a teaspoon of Virol every day. It was a yeast extract and obviously for health, but it was disgusting. Back then I was very keen on sherbet Dip Dabs and liquorice, and I really loved those chocolate discs with hundreds and thousands on – Jazzies.