Andre Agassi says his children realise his fame is “not all that”. The tennis icon, 53, has son Jaden Gil Agassi, 22, and daughter Jaz Elle Agassi, 20, with his fellow athlete wife Steffi Graf, 54, and he says they were left bemused growing up when autograph hunters would approach them in shops. He told People: “I can imagine how somebody looks at that from the outside. “Somehow there’s going to be this moment where they go, ‘These are my parents.’ “So when people are coming up to us in grocery stores, (Jaden and Jaz) were like, ‘What’s up with these people?’ “So you go through a whole phase o…