"although finished ahead of fellow African Samir Azzimani of Morocco in the giant slalom." - although he finished ahead of fellow African Samir Azzimani of Morocco in the giant slalom.
Background
Winter Olympics is a dab link
"fellow skier Leyti Seck was the national's sole athlete" - missing team in between "national's" and "sole"
"Seck, a Germany-born athlete" - German-born
"not finishing in the Men's slalom or giant slalom." - but not finishing in the men's slalom or giant slalom
Alpine Skiing
Nothing wrong here
References
All the text is supported by the references
Sports Reference should only be linked on the first instance
Paris Match, Eurosport Vancouver Sun, Reuters and Associated Press need to be wikilinked
Reference 5 needs The Sunday Telegraph as its work