Rennes marked its Champions League group stage debut with a disappointing 1-1 draw against Russian side Krasnodar on Tuesday, conceding an equalizer just moments after scoring. The long-awaited first Rennes goal in Europe’s elite competition arrived in the 56th minute when striker Serhou Guirassy netted from the penalty spot after center half Yegor Sorokin fouled winger Martin Terrier. But the …