OTTAWA — The Ottawa REDBLACKS return home for Friday Night Football looking to build on the encouraging second half they put together in Montreal as they host the Saskatchewan Roughriders on FanDuel Canada Day Weekend. Ottawa sits at 0-3 and is looking for its first win of the season. Saskatchewan suffered its first loss in Week 4 against the Toronto Argonauts. Here’s three keys to victory for both teams ahead of Friday’s 7:30 p.m. ET kickoff, which can be watched on TSN and RDS2 in Canada, and…