Victoria Beckham is an expert on soccer and is "serious" about her and David's oldest son Brooklyn following in his father's footsteps and becoming a professional.Victoria Beckham is an expert on soccer.The 38-year-old fashion designer, who is married to star player David Beckham, has a great deal of knowledge about the sport and is encouraging their oldest son Brooklyn, 13, to become a professional after he impressed coaches at his former youth team in Los Angeles.An insider from the States told the Daily Star newspaper: "We worked closely with Brooklyn during his time here. The young man has a lot of natural talent."Victoria is a serious soccer mum. She used to call his coach twice a week for a detailed report on how Brooklyn was progressing. She could talk ages about tactics."She really knows her stuff and is very supportive of her children's sporting achievement. Victoria said she'd report everything back to David, but she knows soccer inside out. She can talk a good came and could probably manage a team herself."The couple - who have two other sons, Romeo, 10, Cruz, seven, and 18-month-old daughter Harper - arranged a trial for Brooklyn with English Premier League club Chelsea at their training ground in Cobham, Surrey, South West England last week and David has admitted he is strict with his boys, following in the footsteps of his father before him.David, who is wanted by QPR and West Ham in the UK and Monaco and Paris Saint-Germain in France, recently said: "I'm as hard on my boys as my dad was. They always ask, 'Did I play well?' I'll say, 'You did alright, could have done better.' "