Reuters/Guadalajara, MexicoFormer world 100 metres champion Kim Collins rolled back the years to break the 28-year-old Pan-American Games record on Monday. The 35-year-old from St Kitts and Nevis, the 2003 world champion, clocked 10 seconds flat in the semi-finals for a time two hundredths slower than his personal best. Cuba’s Yarisley Silva dethroned women’s pole vault holder Fabiana Murer in an absorbing duel won with a personal best 4.75 metres to smash her Brazilian rival’s Games record of 4.60. The 24-year-old Silva cleared the bar first time at every height until it was raised to 4.80. Cuba’s joy was doubled when hammer thrower Yipsi Moreno won her third consecutive Games gold and broke her own record with a throw of 75.62 metres, a perfect send-off to her last Pan-Am appearance, she said. “I feel radiant, proud, thrilled to help my country. These are my last Pan-American Games and to have finished like this, I leave happy,” the elated 30-year-old said in tears. Canadian Sultana Frizell, the only other to surpass 70 metres, won silver with Amber Campbell of the US taking bronze. Mexico thrilled a packed house at the new Telmex stadium by winning the day’s two long distance races. Marisol Romero, who pulled further ahead with each lap, was roared to the line by the home crowd as she won the women’s 10,000m in 34 minutes 7.24 seconds.