Arsenal Under-18s manager Jack Wilshere has praised Gunners talent Chido Obi-Martin for his impressive goal haul on Saturday. The 16-year-old forward scored four goals for Arsenal‘s U18s in their 8-3 hammering of Crystal Palace in the U18s Premier League. Wilshere, speaking to the Arsenal website, said Obi-Martin is “developing nicely”. The Gunners coach also praised his teammates for the roles they played in the Dane’s haul. “I’m proud of the team because, for a striker to score four, he needs his teammates, his midfielders and defenders,” said Wilshere after the match at London Colney. “But …