to win the title.) His ranking improved slightly - on June 14 he became World No. 326 and Canada No. 3 (in singles - doubles rankings were not kept then). For the fourth time Genois fell in the first round of the Canadian Open, this time to Australian Geoff Masters 2–6, 5–7. He played doubles again too, losing in the first round partnering compatriot and fellow Davis Cupper Dale Power. 1977 Genois competed in singles at the Taipei Grand Prix and won his first set in a tour match as he fell to American Chris Delaney 7–5, 5–7, 4–6. He also played in a grand slam event for the first time, competing in doubles at the U.S. Open. He and partner Guillermo Oropez lost 2 and 1 in the first round to the legendary doubles pair of Bob Hewitt and Frew McMillan. Despite never having won a tour singles event, remarkably, Genois was ranked World No. 184 on Dec 31, 1977, putting him at Canada No. 2. The only Canadian ranked higher was Greg Halder, at No. 127. 1978 Genois had his best tour results by some margin in 1978. He played in the newly formed challenger tour, reaching the semi-final of the third ever challenger tournament, and first American one, in Shreveport. He and partner Ramiro Benavides, of Bolivia, won the doubles title. The following week at the Birmingham Challenger Genois reached the third round in the singles event. The week after the Asheville Challenger was held with Réjean reaching the second round in singles and taking the title in doubles, again partnering Benavides. The following week Genois, according to the ATP's results archives, played in the Raleigh Challenger and Cincinnati Grand Prix events simultaneously, reaching the second round in both. He scored his first ever win in a grand prix event over American Keith Richardson, 7–6, 7–6. He lost in the second round to Pat DuPré in three sets. Genois also reached the second round in doubles partnering Frenchman Christophe Freyss. In rankings released on July 12, Genois was listed as World No. 115 and Canada No. 1. He continued his good run reaching the quarter-finals of the Virginia Beach Challenger held two weeks later. In doubles he and partner Bernard Fritz lost in the first round. Genois reached his career high ranking of World No. 89 at the end of July. In following two challengers however, Genois