<prompt> Qedela umusho olandelayo: Isikhathi sikaRoger Federer sika-2018 se-tennis saqala ngokusemthethweni ngomhlaka-30 Disemba 2017, ngokuqala kwe  <response>: IHopman Cup, futhi yaphela ngoNovemba 17, 2018, ngokulahlekelwa kuma-semifinals we-ATP Finals. Uqede unyaka ebekwe endaweni yesithathu ku-ATP Rankings. Le sizini ibone uFederer ethuthukisa ukuqala komsebenzi wakhe ngesizini eyi-17 0 21 0 uma kufaka phakathi ukunqoba kwiHopman Cup. UFederer unqobe i-major yakhe engamashumi amabili e-Australian Open futhi wandisa irekhodi lakhe lamasonto e-World No. 1 laya kumaviki angama-310 kule sizini. 