The phrase "title challengers" refers to teams or individuals who have a good chance of winning a championship or being in the running for the top spot in a competition. Full definition
It was inevitable that we wouldn't be able to sustain our position as title challengers and European elites with what we had. (justarsenal.com)
Last season, his goals in the early part of the season were a huge reason why the club were seen as genuine title challengers for a large part of the campaign. (eplindex.com)
If we can see them off however it may well be a good indication that they are not likely to be serious title challengers. (chelseafc.com)