Test Two gets underway in Formula One this week, as the grid's frontrunners plan major upgrades ahead of the season opener in Melbourne at the end of the month.
Somewhat unsurprisingly, Mercedes dominated proceedings this week with hundreds of laps clocked during Test One last week. If it wasn't clear beforehand, the World Champions are the team to beat once again this season. During Test Two, Hamilton and Co. will be looking to iron out the slight mechanical difficulties they faced last week.
Despite attempts not to, I can't help but board the Ferrari hype train once again this season. Pre-season hopes that Ferrari have finally produced a title-winning car will no doubt go up in smoke by the Spanish GP in May, but for now the excitement is slowly building. The Scuderia were arguably the most impressive outfit last week. Sebastian Vettel set some seriously quick times on the soft tyres, and the team have certainly looked to have nailed the regulation changes this year. It's testing, though, so you just never know what shape teams are in until the season opener in Australia.
That being said, occasionally teams struggle so much during testing that you cannot help but fear for them. Step forward McLaren. With their new orange livery and management structure, we were hoping for a McLaren challenger of old for the 2017 season. Instead, we have so far been treated to a shambles of a car. Rumours of a split with engine supplier Honda has been laughed off by the team, but it's clear something is wrong with the relationship. The team were the second slowest of all the teams out on the track last week and have been beset with oil tank issues.
Elsewhere, Toro Rosso have spoken of their confidence that they will lead the midfield pack this season, though a no-show on day four of testing last week suggests their beliefs could be misplaced.
Backmarkers Sauber believe that they have made a great stride forward with their car this season, and hope to be competing with midfield stragglers Haas and Renault during races. Optimistic perhaps, but a competitive Sauber would be a great proposition for the sport.