He’s on thin ice. Curler Alexander Krushelnitsky, whose team won a bronze this year, has reportedly tested positive for meldonium, a banned substance. Russian athletes are currently competing under a neutral flag after their country was blacklisted over allegations of state-sponsored doping. Krushelnitsky had a clean test in late January, and some believe his food or drink could have been spiked. If a second sample, currently being tested, also comes back positive, it could mean Russian athletes aren’t allowed to march under their national flag at closing ceremonies.