By Joshua Browne Roberto Martinez has staunchly backed Cristiano Ronaldo, insisting that the 39-year-old forward is in peak condition to handle a heavy workload for Portugal throughout Euro 2024. Despite his impressive record in qualifying, Ronaldo couldn’t quite kick off this summer’s European Championship on a high note, as he failed to score in Tuesday’s narrow 2-1 victory over Czechia. Lukas Provod broke the deadlock shortly after the hour mark before an own goal from Robin Hranac restored parity and Francisco Conceicao sealed the win in dramatic fashion for the Portuguese. After the final…