Cristiano Ronaldo has been guaranteed a regular starting place at Euro 2024 by coach Roberto Martinez, who said on Friday the 39-year-old is still fit enough for this level. The Portuguese will reach the last 16 with a win over Turkey on Saturday in Dortmund following their opening 2-1 win over the Czechs. “For us, he brings experience, he creates goalscoring opportunities and helps us to open up spaces,” Martinez told a news conference when asked if a 39-year-old playing in the Saudi league can handle it. “He’s in the national team because he deserves it. All the data proves that.” Ronaldo ha…