I am a Marcos fan as well, so cool to chat tennis here.
Ostrava Challenger (starting 27/Apr/2009) seems to be Marcos next tournament. This tournamnet can give him the best start in the clay season, few matches, few wins and 75 points to raise him 15 to 20 places. Good luck Marcos!
*He has also expressed interest to play the 20th edition of the Estoril Open, has made application for the wild card.