Yesterday, in the quarterfinal round of the Davis Cup, Novak Djokovic soldiered on with a sprained ankle to beat Sam Querrey in four sets, only the first two of which were competitive. Now, as Djokovic enters the most challenging part of the tennis season, taking on Rafael Nadal on the clay courts of Europe and then moving on quickly to the grass courts of Wimbledon, two slams held in less than one month, the word is that Djokovic might be seriously injured. Djokovic said after the match that put Serbia in the semifinals of the Davis Cup: “One hour, one hour and a half after the end of the match, all I can say is, it doesn’t look good.”The pernicious lie about Davis Cup is that it's actually a competition that matters and produces thrilling tennis. But in fact, it's more like the World Baseball Classic, entertaining at times, but not a true barometer of the tennis superiority of any nation. And the Baseball Classic is held every four years and at the beginning of the season so that it doesn't interfere with the season, itself. This is how Davis Cup should be held, in a big site, every four years, where the top players of every country will compete on an international stage. Otherwise, injuries like Djokovic's will continue to mar the most important events of the season.How important is Davis Cup? Of the eight teams competing this past weekend, only Djokovic and Jo-Wilfried Tsonga were Top-10 players. Tomas Berdych, Juan-Martin Del Potro and Richard Gasquet, the other Top-10 players who could've competed, all bowed out. Serbia now will meet another tennis powerhouse (sic), Canada, in the semifinals of Davis Cup while Argentina plays the Czech Republic. While these could be interesting contests, are they must-see tennis? I don't think so, especially if Djokovic, Berdych and Del Potro all bow out. Yesterday in Argentina, instead of seeing Tsonga pair off against Del Potro in the climatic fifth tie, we saw Carlos Berloq--yes, this is the same Berloq who lost both of his career matches to Vince Spadea, winning a total of six games in two matches-play Gilles Simon. Djokovic hurt himself playing against Sam Querrey, who even against an injured Djokovic, managed to win only one game in the final two sets. It was Milos Raonic vs. Andreas Seppi in Canada. These are not compelling matches even in the realm of Davis Cup. The Americans played Brazil before Serbia this year in Jacksonville, Florida and there wasn't much interest in the home arena. Yesterday, in Boise, Idaho, the zaniness and fierce patriotism never surfaced either. Davis Cup competition can be thrilling, but lately, it too often comes down in a soft thud. Djokovic's victory yesterday was being compared to John McEnroe's 1982 victory against Mats Wilander in Kansas City. Djokovic and McEnroe were both coming back from big losses, Mac to Connors in the Wimbledon Finals and Djoko to Del Potro and Tommy Haas in Indian Wells and Key Biscayne, respectively. But beating Querrey is a far cry from beating Wilander and the match dynamic yesterday never came close to matching that Hall of Fame match up that went five sets between two legends of the game. The Czech Republic win over Spain last year in the Cup finals was thrilling, but the best player on both teams, Nadal, didn't play. Why play Davis Cup if most of the top players aren't playing and the one who did this weekend, might have incurred a serious injury that will impair his 2013 season? Serbia-Canada, Argentina-Czech Republic--do these match ups constitute must-see tennis? Not in my eyes. It's time to revise the Davis Cup competition to lessen its toll on the real important events of the tennis season and make the event more compelling.