By Tom Finn DOHA (Reuters) - Competitors at a world cycling competition in Qatar this month may have enjoyed the hospitality but they also struggled in a swirl of heat, wind, dust and humidity. If the presence of such top cyclists as Peter Sagan and Marc Cavendish for the UCI Road World Championships fed the Gulf state's ambitions of becoming an international sporting capital, the event also highlighted some of the strains the country could face when it hosts the soccer World Cup in 2022. Qatar is using its wealth to host a flurry of big competitions, including the Asian soccer cup, the Men's Handball World Championships, and the FINA World Swimming Championships. More...