The Capitals are 6-1-1 in their last meetings against the Leafs, who are coming off Saturday night's 1-0 loss to Philadelphia.
With a win over Toronto tonight the Caps have a chance to grab the Southeast Division lead.
On Saturday afternoon Washington was a fast-starter in Boston and kept up the pace long enough to outlast the Bruins in their own barn.
Alexander Semin had a goal and set up Jay Beagle's go-ahead score Saturday, lifting the Washington Capitals to a win over the Boston Bruins.
With a win today in Boston the Capitals can climb within one point of the Southeast Division lead.